998 lines
39 KiB
Mathematica
998 lines
39 KiB
Mathematica
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/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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#import "AIRMapManager.h"
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#import <React/RCTBridge.h>
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#import <React/RCTUIManager.h>
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#import <React/RCTConvert.h>
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#import <React/RCTConvert+CoreLocation.h>
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#import <React/RCTEventDispatcher.h>
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#import <React/RCTViewManager.h>
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#import <React/UIView+React.h>
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#import "AIRMap.h"
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#import "AIRMapMarker.h"
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#import "AIRMapPolyline.h"
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#import "AIRMapPolygon.h"
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#import "AIRMapCircle.h"
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#import "SMCalloutView.h"
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#import "AIRMapUrlTile.h"
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#import "AIRMapLocalTile.h"
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#import "AIRMapSnapshot.h"
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#import "RCTConvert+AirMap.h"
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#import <MapKit/MapKit.h>
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static NSString *const RCTMapViewKey = @"MapView";
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@interface AIRMapManager() <MKMapViewDelegate>
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@end
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@implementation AIRMapManager
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{
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BOOL didCallOnMapReady;
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}
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RCT_EXPORT_MODULE()
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- (UIView *)view
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{
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AIRMap *map = [AIRMap new];
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map.delegate = self;
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// MKMapView doesn't report tap events, so we attach gesture recognizers to it
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UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleMapTap:)];
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UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleMapLongPress:)];
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UIPanGestureRecognizer *drag = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handleMapDrag:)];
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[drag setMinimumNumberOfTouches:1];
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[drag setMaximumNumberOfTouches:1];
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// setting this to NO allows the parent MapView to continue receiving marker selection events
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tap.cancelsTouchesInView = NO;
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longPress.cancelsTouchesInView = NO;
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// disable drag by default
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drag.enabled = NO;
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[map addGestureRecognizer:tap];
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[map addGestureRecognizer:longPress];
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[map addGestureRecognizer:drag];
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return map;
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}
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RCT_EXPORT_VIEW_PROPERTY(showsUserLocation, BOOL)
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RCT_EXPORT_VIEW_PROPERTY(userLocationAnnotationTitle, NSString)
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RCT_EXPORT_VIEW_PROPERTY(followsUserLocation, BOOL)
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RCT_EXPORT_VIEW_PROPERTY(showsPointsOfInterest, BOOL)
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RCT_EXPORT_VIEW_PROPERTY(showsBuildings, BOOL)
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RCT_EXPORT_VIEW_PROPERTY(showsCompass, BOOL)
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RCT_EXPORT_VIEW_PROPERTY(showsScale, BOOL)
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RCT_EXPORT_VIEW_PROPERTY(showsTraffic, BOOL)
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RCT_EXPORT_VIEW_PROPERTY(zoomEnabled, BOOL)
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RCT_EXPORT_VIEW_PROPERTY(rotateEnabled, BOOL)
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RCT_EXPORT_VIEW_PROPERTY(scrollEnabled, BOOL)
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RCT_EXPORT_VIEW_PROPERTY(pitchEnabled, BOOL)
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RCT_EXPORT_VIEW_PROPERTY(cacheEnabled, BOOL)
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RCT_EXPORT_VIEW_PROPERTY(loadingEnabled, BOOL)
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RCT_EXPORT_VIEW_PROPERTY(loadingBackgroundColor, UIColor)
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RCT_EXPORT_VIEW_PROPERTY(loadingIndicatorColor, UIColor)
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RCT_EXPORT_VIEW_PROPERTY(handlePanDrag, BOOL)
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RCT_EXPORT_VIEW_PROPERTY(maxDelta, CGFloat)
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RCT_EXPORT_VIEW_PROPERTY(minDelta, CGFloat)
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RCT_EXPORT_VIEW_PROPERTY(legalLabelInsets, UIEdgeInsets)
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RCT_EXPORT_VIEW_PROPERTY(mapType, MKMapType)
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RCT_EXPORT_VIEW_PROPERTY(onMapReady, RCTBubblingEventBlock)
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RCT_EXPORT_VIEW_PROPERTY(onChange, RCTBubblingEventBlock)
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RCT_EXPORT_VIEW_PROPERTY(onPanDrag, RCTBubblingEventBlock)
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RCT_EXPORT_VIEW_PROPERTY(onPress, RCTBubblingEventBlock)
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RCT_EXPORT_VIEW_PROPERTY(onLongPress, RCTBubblingEventBlock)
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RCT_EXPORT_VIEW_PROPERTY(onMarkerPress, RCTDirectEventBlock)
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RCT_EXPORT_VIEW_PROPERTY(onMarkerSelect, RCTDirectEventBlock)
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RCT_EXPORT_VIEW_PROPERTY(onMarkerDeselect, RCTDirectEventBlock)
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RCT_EXPORT_VIEW_PROPERTY(onMarkerDragStart, RCTDirectEventBlock)
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RCT_EXPORT_VIEW_PROPERTY(onMarkerDrag, RCTDirectEventBlock)
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RCT_EXPORT_VIEW_PROPERTY(onMarkerDragEnd, RCTDirectEventBlock)
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RCT_EXPORT_VIEW_PROPERTY(onCalloutPress, RCTDirectEventBlock)
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RCT_CUSTOM_VIEW_PROPERTY(initialRegion, MKCoordinateRegion, AIRMap)
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{
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if (json == nil) return;
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// don't emit region change events when we are setting the initialRegion
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BOOL originalIgnore = view.ignoreRegionChanges;
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view.ignoreRegionChanges = YES;
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[view setInitialRegion:[RCTConvert MKCoordinateRegion:json]];
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view.ignoreRegionChanges = originalIgnore;
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}
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RCT_EXPORT_VIEW_PROPERTY(minZoomLevel, CGFloat)
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RCT_EXPORT_VIEW_PROPERTY(maxZoomLevel, CGFloat)
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RCT_CUSTOM_VIEW_PROPERTY(region, MKCoordinateRegion, AIRMap)
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{
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if (json == nil) return;
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// don't emit region change events when we are setting the region
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BOOL originalIgnore = view.ignoreRegionChanges;
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view.ignoreRegionChanges = YES;
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[view setRegion:[RCTConvert MKCoordinateRegion:json] animated:NO];
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view.ignoreRegionChanges = originalIgnore;
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}
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#pragma mark exported MapView methods
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RCT_EXPORT_METHOD(animateToRegion:(nonnull NSNumber *)reactTag
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withRegion:(MKCoordinateRegion)region
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withDuration:(CGFloat)duration)
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{
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[self.bridge.uiManager addUIBlock:^(__unused RCTUIManager *uiManager, NSDictionary<NSNumber *, UIView *> *viewRegistry) {
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id view = viewRegistry[reactTag];
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if (![view isKindOfClass:[AIRMap class]]) {
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RCTLogError(@"Invalid view returned from registry, expecting AIRMap, got: %@", view);
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} else {
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[AIRMap animateWithDuration:duration/1000 animations:^{
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[(AIRMap *)view setRegion:region animated:YES];
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}];
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}
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}];
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}
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RCT_EXPORT_METHOD(animateToCoordinate:(nonnull NSNumber *)reactTag
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withRegion:(CLLocationCoordinate2D)latlng
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withDuration:(CGFloat)duration)
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{
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[self.bridge.uiManager addUIBlock:^(__unused RCTUIManager *uiManager, NSDictionary<NSNumber *, UIView *> *viewRegistry) {
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id view = viewRegistry[reactTag];
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if (![view isKindOfClass:[AIRMap class]]) {
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RCTLogError(@"Invalid view returned from registry, expecting AIRMap, got: %@", view);
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} else {
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AIRMap *mapView = (AIRMap *)view;
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MKCoordinateRegion region;
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region.span = mapView.region.span;
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region.center = latlng;
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[AIRMap animateWithDuration:duration/1000 animations:^{
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[mapView setRegion:region animated:YES];
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}];
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}
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}];
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}
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RCT_EXPORT_METHOD(animateToViewingAngle:(nonnull NSNumber *)reactTag
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withAngle:(double)angle
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withDuration:(CGFloat)duration)
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{
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[self.bridge.uiManager addUIBlock:^(__unused RCTUIManager *uiManager, NSDictionary<NSNumber *, UIView *> *viewRegistry) {
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id view = viewRegistry[reactTag];
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if (![view isKindOfClass:[AIRMap class]]) {
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RCTLogError(@"Invalid view returned from registry, expecting AIRMap, got: %@", view);
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} else {
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AIRMap *mapView = (AIRMap *)view;
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MKMapCamera *mapCamera = [[mapView camera] copy];
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[mapCamera setPitch:angle];
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[AIRMap animateWithDuration:duration/1000 animations:^{
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[mapView setCamera:mapCamera animated:YES];
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}];
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}
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}];
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}
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RCT_EXPORT_METHOD(animateToBearing:(nonnull NSNumber *)reactTag
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withBearing:(CGFloat)bearing
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withDuration:(CGFloat)duration)
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{
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[self.bridge.uiManager addUIBlock:^(__unused RCTUIManager *uiManager, NSDictionary<NSNumber *, UIView *> *viewRegistry) {
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id view = viewRegistry[reactTag];
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if (![view isKindOfClass:[AIRMap class]]) {
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RCTLogError(@"Invalid view returned from registry, expecting AIRMap, got: %@", view);
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} else {
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AIRMap *mapView = (AIRMap *)view;
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MKMapCamera *mapCamera = [[mapView camera] copy];
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[mapCamera setHeading:bearing];
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[AIRMap animateWithDuration:duration/1000 animations:^{
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[mapView setCamera:mapCamera animated:YES];
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}];
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}
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}];
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}
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RCT_EXPORT_METHOD(fitToElements:(nonnull NSNumber *)reactTag
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animated:(BOOL)animated)
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{
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[self.bridge.uiManager addUIBlock:^(__unused RCTUIManager *uiManager, NSDictionary<NSNumber *, UIView *> *viewRegistry) {
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id view = viewRegistry[reactTag];
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if (![view isKindOfClass:[AIRMap class]]) {
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RCTLogError(@"Invalid view returned from registry, expecting AIRMap, got: %@", view);
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} else {
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AIRMap *mapView = (AIRMap *)view;
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// TODO(lmr): we potentially want to include overlays here... and could concat the two arrays together.
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dispatch_after(dispatch_time(DISPATCH_TIME_NOW, 0.1 * NSEC_PER_SEC), dispatch_get_main_queue(), ^{
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[mapView showAnnotations:mapView.annotations animated:animated];
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});
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}
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}];
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}
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RCT_EXPORT_METHOD(fitToSuppliedMarkers:(nonnull NSNumber *)reactTag
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markers:(nonnull NSArray *)markers
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animated:(BOOL)animated)
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{
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[self.bridge.uiManager addUIBlock:^(__unused RCTUIManager *uiManager, NSDictionary<NSNumber *, UIView *> *viewRegistry) {
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id view = viewRegistry[reactTag];
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if (![view isKindOfClass:[AIRMap class]]) {
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RCTLogError(@"Invalid view returned from registry, expecting AIRMap, got: %@", view);
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} else {
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AIRMap *mapView = (AIRMap *)view;
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// TODO(lmr): we potentially want to include overlays here... and could concat the two arrays together.
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// id annotations = mapView.annotations;
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NSPredicate *filterMarkers = [NSPredicate predicateWithBlock:^BOOL(id evaluatedObject, NSDictionary *bindings) {
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AIRMapMarker *marker = (AIRMapMarker *)evaluatedObject;
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return [marker isKindOfClass:[AIRMapMarker class]] && [markers containsObject:marker.identifier];
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}];
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NSArray *filteredMarkers = [mapView.annotations filteredArrayUsingPredicate:filterMarkers];
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[mapView showAnnotations:filteredMarkers animated:animated];
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}
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}];
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}
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RCT_EXPORT_METHOD(fitToCoordinates:(nonnull NSNumber *)reactTag
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coordinates:(nonnull NSArray<AIRMapCoordinate *> *)coordinates
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edgePadding:(nonnull NSDictionary *)edgePadding
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animated:(BOOL)animated)
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{
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[self.bridge.uiManager addUIBlock:^(__unused RCTUIManager *uiManager, NSDictionary<NSNumber *, UIView *> *viewRegistry) {
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id view = viewRegistry[reactTag];
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if (![view isKindOfClass:[AIRMap class]]) {
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RCTLogError(@"Invalid view returned from registry, expecting AIRMap, got: %@", view);
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} else {
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AIRMap *mapView = (AIRMap *)view;
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// Create Polyline with coordinates
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CLLocationCoordinate2D coords[coordinates.count];
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for(int i = 0; i < coordinates.count; i++)
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{
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coords[i] = coordinates[i].coordinate;
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}
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MKPolyline *polyline = [MKPolyline polylineWithCoordinates:coords count:coordinates.count];
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// Set Map viewport
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CGFloat top = [RCTConvert CGFloat:edgePadding[@"top"]];
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CGFloat right = [RCTConvert CGFloat:edgePadding[@"right"]];
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CGFloat bottom = [RCTConvert CGFloat:edgePadding[@"bottom"]];
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CGFloat left = [RCTConvert CGFloat:edgePadding[@"left"]];
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[mapView setVisibleMapRect:[polyline boundingMapRect] edgePadding:UIEdgeInsetsMake(top, left, bottom, right) animated:animated];
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}
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}];
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}
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RCT_EXPORT_METHOD(takeSnapshot:(nonnull NSNumber *)reactTag
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width:(nonnull NSNumber *)width
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height:(nonnull NSNumber *)height
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region:(MKCoordinateRegion)region
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format:(nonnull NSString *)format
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quality:(nonnull NSNumber *)quality
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result:(nonnull NSString *)result
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callback:(RCTResponseSenderBlock)callback)
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{
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[self.bridge.uiManager addUIBlock:^(__unused RCTUIManager *uiManager, NSDictionary<NSNumber *, UIView *> *viewRegistry) {
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id view = viewRegistry[reactTag];
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if (![view isKindOfClass:[AIRMap class]]) {
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RCTLogError(@"Invalid view returned from registry, expecting AIRMap, got: %@", view);
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} else {
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AIRMap *mapView = (AIRMap *)view;
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MKMapSnapshotOptions *options = [[MKMapSnapshotOptions alloc] init];
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options.region = (region.center.latitude && region.center.longitude) ? region : mapView.region;
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options.size = CGSizeMake(
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([width floatValue] == 0) ? mapView.bounds.size.width : [width floatValue],
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([height floatValue] == 0) ? mapView.bounds.size.height : [height floatValue]
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);
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options.scale = [[UIScreen mainScreen] scale];
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MKMapSnapshotter *snapshotter = [[MKMapSnapshotter alloc] initWithOptions:options];
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[self takeMapSnapshot:mapView
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snapshotter:snapshotter
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format:format
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quality:quality.floatValue
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result:result
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callback:callback];
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}
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}];
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}
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#pragma mark Take Snapshot
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|||
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- (void)takeMapSnapshot:(AIRMap *)mapView
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|
|
snapshotter:(MKMapSnapshotter *) snapshotter
|
|||
|
|
format:(NSString *)format
|
|||
|
|
quality:(CGFloat) quality
|
|||
|
|
result:(NSString *)result
|
|||
|
|
callback:(RCTResponseSenderBlock) callback {
|
|||
|
|
NSTimeInterval timeStamp = [[NSDate date] timeIntervalSince1970];
|
|||
|
|
NSString *pathComponent = [NSString stringWithFormat:@"Documents/snapshot-%.20lf.%@", timeStamp, format];
|
|||
|
|
NSString *filePath = [NSHomeDirectory() stringByAppendingPathComponent: pathComponent];
|
|||
|
|
|
|||
|
|
[snapshotter startWithQueue:dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)
|
|||
|
|
completionHandler:^(MKMapSnapshot *snapshot, NSError *error) {
|
|||
|
|
if (error) {
|
|||
|
|
callback(@[error]);
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
MKAnnotationView *pin = [[MKPinAnnotationView alloc] initWithAnnotation:nil reuseIdentifier:nil];
|
|||
|
|
|
|||
|
|
UIImage *image = snapshot.image;
|
|||
|
|
UIGraphicsBeginImageContextWithOptions(image.size, YES, image.scale);
|
|||
|
|
{
|
|||
|
|
[image drawAtPoint:CGPointMake(0.0f, 0.0f)];
|
|||
|
|
|
|||
|
|
CGRect rect = CGRectMake(0.0f, 0.0f, image.size.width, image.size.height);
|
|||
|
|
|
|||
|
|
for (id <MKAnnotation> annotation in mapView.annotations) {
|
|||
|
|
CGPoint point = [snapshot pointForCoordinate:annotation.coordinate];
|
|||
|
|
|
|||
|
|
MKAnnotationView* anView = [mapView viewForAnnotation: annotation];
|
|||
|
|
|
|||
|
|
if (anView){
|
|||
|
|
pin = anView;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (CGRectContainsPoint(rect, point)) {
|
|||
|
|
point.x = point.x + pin.centerOffset.x - (pin.bounds.size.width / 2.0f);
|
|||
|
|
point.y = point.y + pin.centerOffset.y - (pin.bounds.size.height / 2.0f);
|
|||
|
|
[pin.image drawAtPoint:point];
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
for (id <AIRMapSnapshot> overlay in mapView.overlays) {
|
|||
|
|
if ([overlay respondsToSelector:@selector(drawToSnapshot:context:)]) {
|
|||
|
|
[overlay drawToSnapshot:snapshot context:UIGraphicsGetCurrentContext()];
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
UIImage *compositeImage = UIGraphicsGetImageFromCurrentImageContext();
|
|||
|
|
|
|||
|
|
NSData *data;
|
|||
|
|
if ([format isEqualToString:@"png"]) {
|
|||
|
|
data = UIImagePNGRepresentation(compositeImage);
|
|||
|
|
}
|
|||
|
|
else if([format isEqualToString:@"jpg"]) {
|
|||
|
|
data = UIImageJPEGRepresentation(compositeImage, quality);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if ([result isEqualToString:@"file"]) {
|
|||
|
|
[data writeToFile:filePath atomically:YES];
|
|||
|
|
callback(@[[NSNull null], filePath]);
|
|||
|
|
}
|
|||
|
|
else if ([result isEqualToString:@"base64"]) {
|
|||
|
|
callback(@[[NSNull null], [data base64EncodedStringWithOptions:NSDataBase64EncodingEndLineWithCarriageReturn]]);
|
|||
|
|
}
|
|||
|
|
else if ([result isEqualToString:@"legacy"]) {
|
|||
|
|
|
|||
|
|
// In the initial (iOS only) implementation of takeSnapshot,
|
|||
|
|
// both the uri and the base64 encoded string were returned.
|
|||
|
|
// Returning both is rarely useful and in fact causes a
|
|||
|
|
// performance penalty when only the file URI is desired.
|
|||
|
|
// In that case the base64 encoded string was always marshalled
|
|||
|
|
// over the JS-bridge (which is quite slow).
|
|||
|
|
// A new more flexible API was created to cover this.
|
|||
|
|
// This code should be removed in a future release when the
|
|||
|
|
// old API is fully deprecated.
|
|||
|
|
[data writeToFile:filePath atomically:YES];
|
|||
|
|
NSDictionary *snapshotData = @{
|
|||
|
|
@"uri": filePath,
|
|||
|
|
@"data": [data base64EncodedStringWithOptions:NSDataBase64EncodingEndLineWithCarriageReturn]
|
|||
|
|
};
|
|||
|
|
callback(@[[NSNull null], snapshotData]);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
UIGraphicsEndImageContext();
|
|||
|
|
}];
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
#pragma mark Gesture Recognizer Handlers
|
|||
|
|
|
|||
|
|
#define MAX_DISTANCE_PX 10.0f
|
|||
|
|
- (void)handleMapTap:(UITapGestureRecognizer *)recognizer {
|
|||
|
|
AIRMap *map = (AIRMap *)recognizer.view;
|
|||
|
|
|
|||
|
|
CGPoint tapPoint = [recognizer locationInView:map];
|
|||
|
|
CLLocationCoordinate2D tapCoordinate = [map convertPoint:tapPoint toCoordinateFromView:map];
|
|||
|
|
MKMapPoint mapPoint = MKMapPointForCoordinate(tapCoordinate);
|
|||
|
|
CGPoint mapPointAsCGP = CGPointMake(mapPoint.x, mapPoint.y);
|
|||
|
|
|
|||
|
|
double maxMeters = [self metersFromPixel:MAX_DISTANCE_PX atPoint:tapPoint forMap:map];
|
|||
|
|
float nearestDistance = MAXFLOAT;
|
|||
|
|
AIRMapPolyline *nearestPolyline = nil;
|
|||
|
|
|
|||
|
|
for (id<MKOverlay> overlay in map.overlays) {
|
|||
|
|
if([overlay isKindOfClass:[AIRMapPolygon class]]){
|
|||
|
|
AIRMapPolygon *polygon = (AIRMapPolygon*) overlay;
|
|||
|
|
if (polygon.onPress) {
|
|||
|
|
CGMutablePathRef mpr = CGPathCreateMutable();
|
|||
|
|
|
|||
|
|
for(int i = 0; i < polygon.coordinates.count; i++) {
|
|||
|
|
AIRMapCoordinate *c = polygon.coordinates[i];
|
|||
|
|
MKMapPoint mp = MKMapPointForCoordinate(c.coordinate);
|
|||
|
|
if (i == 0) {
|
|||
|
|
CGPathMoveToPoint(mpr, NULL, mp.x, mp.y);
|
|||
|
|
} else {
|
|||
|
|
CGPathAddLineToPoint(mpr, NULL, mp.x, mp.y);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (CGPathContainsPoint(mpr, NULL, mapPointAsCGP, FALSE)) {
|
|||
|
|
id event = @{
|
|||
|
|
@"action": @"polygon-press",
|
|||
|
|
};
|
|||
|
|
polygon.onPress(event);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
CGPathRelease(mpr);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if([overlay isKindOfClass:[AIRMapPolyline class]]){
|
|||
|
|
AIRMapPolyline *polyline = (AIRMapPolyline*) overlay;
|
|||
|
|
if (polyline.onPress) {
|
|||
|
|
float distance = [self distanceOfPoint:MKMapPointForCoordinate(tapCoordinate)
|
|||
|
|
toPoly:polyline];
|
|||
|
|
if (distance < nearestDistance) {
|
|||
|
|
nearestDistance = distance;
|
|||
|
|
nearestPolyline = polyline;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (nearestDistance <= maxMeters) {
|
|||
|
|
id event = @{
|
|||
|
|
@"action": @"polyline-press",
|
|||
|
|
};
|
|||
|
|
nearestPolyline.onPress(event);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (!map.onPress) return;
|
|||
|
|
map.onPress(@{
|
|||
|
|
@"coordinate": @{
|
|||
|
|
@"latitude": @(tapCoordinate.latitude),
|
|||
|
|
@"longitude": @(tapCoordinate.longitude),
|
|||
|
|
},
|
|||
|
|
@"position": @{
|
|||
|
|
@"x": @(tapPoint.x),
|
|||
|
|
@"y": @(tapPoint.y),
|
|||
|
|
},
|
|||
|
|
});
|
|||
|
|
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
- (void)handleMapDrag:(UIPanGestureRecognizer*)recognizer {
|
|||
|
|
AIRMap *map = (AIRMap *)recognizer.view;
|
|||
|
|
if (!map.onPanDrag) return;
|
|||
|
|
|
|||
|
|
CGPoint touchPoint = [recognizer locationInView:map];
|
|||
|
|
CLLocationCoordinate2D coord = [map convertPoint:touchPoint toCoordinateFromView:map];
|
|||
|
|
map.onPanDrag(@{
|
|||
|
|
@"coordinate": @{
|
|||
|
|
@"latitude": @(coord.latitude),
|
|||
|
|
@"longitude": @(coord.longitude),
|
|||
|
|
},
|
|||
|
|
@"position": @{
|
|||
|
|
@"x": @(touchPoint.x),
|
|||
|
|
@"y": @(touchPoint.y),
|
|||
|
|
},
|
|||
|
|
});
|
|||
|
|
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
- (void)handleMapLongPress:(UITapGestureRecognizer *)recognizer {
|
|||
|
|
|
|||
|
|
// NOTE: android only does the equivalent of "began", so we only send in this case
|
|||
|
|
if (recognizer.state != UIGestureRecognizerStateBegan) return;
|
|||
|
|
|
|||
|
|
AIRMap *map = (AIRMap *)recognizer.view;
|
|||
|
|
if (!map.onLongPress) return;
|
|||
|
|
|
|||
|
|
CGPoint touchPoint = [recognizer locationInView:map];
|
|||
|
|
CLLocationCoordinate2D coord = [map convertPoint:touchPoint toCoordinateFromView:map];
|
|||
|
|
|
|||
|
|
map.onLongPress(@{
|
|||
|
|
@"coordinate": @{
|
|||
|
|
@"latitude": @(coord.latitude),
|
|||
|
|
@"longitude": @(coord.longitude),
|
|||
|
|
},
|
|||
|
|
@"position": @{
|
|||
|
|
@"x": @(touchPoint.x),
|
|||
|
|
@"y": @(touchPoint.y),
|
|||
|
|
},
|
|||
|
|
});
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
#pragma mark MKMapViewDelegate
|
|||
|
|
|
|||
|
|
#pragma mark Polyline stuff
|
|||
|
|
|
|||
|
|
- (MKOverlayRenderer *)mapView:(MKMapView *)mapView rendererForOverlay:(id <MKOverlay>)overlay{
|
|||
|
|
if ([overlay isKindOfClass:[AIRMapPolyline class]]) {
|
|||
|
|
return ((AIRMapPolyline *)overlay).renderer;
|
|||
|
|
} else if ([overlay isKindOfClass:[AIRMapPolygon class]]) {
|
|||
|
|
return ((AIRMapPolygon *)overlay).renderer;
|
|||
|
|
} else if ([overlay isKindOfClass:[AIRMapCircle class]]) {
|
|||
|
|
return ((AIRMapCircle *)overlay).renderer;
|
|||
|
|
} else if ([overlay isKindOfClass:[AIRMapUrlTile class]]) {
|
|||
|
|
return ((AIRMapUrlTile *)overlay).renderer;
|
|||
|
|
} else if ([overlay isKindOfClass:[AIRMapLocalTile class]]) {
|
|||
|
|
return ((AIRMapLocalTile *)overlay).renderer;
|
|||
|
|
} else if([overlay isKindOfClass:[MKTileOverlay class]]) {
|
|||
|
|
return [[MKTileOverlayRenderer alloc] initWithTileOverlay:overlay];
|
|||
|
|
} else {
|
|||
|
|
return nil;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
#pragma mark Annotation Stuff
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
- (void)mapView:(AIRMap *)mapView didSelectAnnotationView:(MKAnnotationView *)view
|
|||
|
|
{
|
|||
|
|
if ([view.annotation isKindOfClass:[AIRMapMarker class]]) {
|
|||
|
|
[(AIRMapMarker *)view.annotation showCalloutView];
|
|||
|
|
} else if ([view.annotation isKindOfClass:[MKUserLocation class]] && mapView.userLocationAnnotationTitle != nil && view.annotation.title != mapView.userLocationAnnotationTitle) {
|
|||
|
|
[(MKUserLocation*)view.annotation setTitle: mapView.userLocationAnnotationTitle];
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
- (void)mapView:(AIRMap *)mapView didDeselectAnnotationView:(MKAnnotationView *)view {
|
|||
|
|
if ([view.annotation isKindOfClass:[AIRMapMarker class]]) {
|
|||
|
|
[(AIRMapMarker *)view.annotation hideCalloutView];
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
- (MKAnnotationView *)mapView:(__unused AIRMap *)mapView viewForAnnotation:(AIRMapMarker *)marker
|
|||
|
|
{
|
|||
|
|
if (![marker isKindOfClass:[AIRMapMarker class]]) {
|
|||
|
|
if ([marker isKindOfClass:[MKUserLocation class]] && mapView.userLocationAnnotationTitle != nil) {
|
|||
|
|
[(MKUserLocation*)marker setTitle: mapView.userLocationAnnotationTitle];
|
|||
|
|
return nil;
|
|||
|
|
}
|
|||
|
|
return nil;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
marker.map = mapView;
|
|||
|
|
return [marker getAnnotationView];
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
static int kDragCenterContext;
|
|||
|
|
|
|||
|
|
- (void)mapView:(AIRMap *)mapView
|
|||
|
|
annotationView:(MKAnnotationView *)view
|
|||
|
|
didChangeDragState:(MKAnnotationViewDragState)newState
|
|||
|
|
fromOldState:(MKAnnotationViewDragState)oldState
|
|||
|
|
{
|
|||
|
|
if (![view.annotation isKindOfClass:[AIRMapMarker class]]) return;
|
|||
|
|
AIRMapMarker *marker = (AIRMapMarker *)view.annotation;
|
|||
|
|
|
|||
|
|
BOOL isPinView = [view isKindOfClass:[MKPinAnnotationView class]];
|
|||
|
|
|
|||
|
|
id event = @{
|
|||
|
|
@"id": marker.identifier ?: @"unknown",
|
|||
|
|
@"coordinate": @{
|
|||
|
|
@"latitude": @(marker.coordinate.latitude),
|
|||
|
|
@"longitude": @(marker.coordinate.longitude)
|
|||
|
|
}
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
if (newState == MKAnnotationViewDragStateEnding || newState == MKAnnotationViewDragStateCanceling) {
|
|||
|
|
if (!isPinView) {
|
|||
|
|
[view setDragState:MKAnnotationViewDragStateNone animated:NO];
|
|||
|
|
}
|
|||
|
|
if (mapView.onMarkerDragEnd) mapView.onMarkerDragEnd(event);
|
|||
|
|
if (marker.onDragEnd) marker.onDragEnd(event);
|
|||
|
|
|
|||
|
|
[view removeObserver:self forKeyPath:@"center"];
|
|||
|
|
} else if (newState == MKAnnotationViewDragStateStarting) {
|
|||
|
|
// MapKit doesn't emit continuous drag events. To get around this, we are going to use KVO.
|
|||
|
|
[view addObserver:self forKeyPath:@"center" options:NSKeyValueObservingOptionNew context:&kDragCenterContext];
|
|||
|
|
|
|||
|
|
if (mapView.onMarkerDragStart) mapView.onMarkerDragStart(event);
|
|||
|
|
if (marker.onDragStart) marker.onDragStart(event);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
- (void)observeValueForKeyPath:(NSString *)keyPath
|
|||
|
|
ofObject:(id)object
|
|||
|
|
change:(NSDictionary *)change
|
|||
|
|
context:(void *)context
|
|||
|
|
{
|
|||
|
|
if ([keyPath isEqualToString:@"center"] && [object isKindOfClass:[MKAnnotationView class]]) {
|
|||
|
|
MKAnnotationView *view = (MKAnnotationView *)object;
|
|||
|
|
AIRMapMarker *marker = (AIRMapMarker *)view.annotation;
|
|||
|
|
|
|||
|
|
// a marker we don't control might be getting dragged. Check just in case.
|
|||
|
|
if (!marker) return;
|
|||
|
|
|
|||
|
|
AIRMap *map = marker.map;
|
|||
|
|
|
|||
|
|
// don't waste time calculating if there are no events to listen to it
|
|||
|
|
if (!map.onMarkerDrag && !marker.onDrag) return;
|
|||
|
|
|
|||
|
|
CGPoint position = CGPointMake(view.center.x - view.centerOffset.x, view.center.y - view.centerOffset.y);
|
|||
|
|
CLLocationCoordinate2D coordinate = [map convertPoint:position toCoordinateFromView:map];
|
|||
|
|
|
|||
|
|
id event = @{
|
|||
|
|
@"id": marker.identifier ?: @"unknown",
|
|||
|
|
@"position": @{
|
|||
|
|
@"x": @(position.x),
|
|||
|
|
@"y": @(position.y),
|
|||
|
|
},
|
|||
|
|
@"coordinate": @{
|
|||
|
|
@"latitude": @(coordinate.latitude),
|
|||
|
|
@"longitude": @(coordinate.longitude),
|
|||
|
|
}
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
if (map.onMarkerDrag) map.onMarkerDrag(event);
|
|||
|
|
if (marker.onDrag) marker.onDrag(event);
|
|||
|
|
|
|||
|
|
} else {
|
|||
|
|
// This message is not for me; pass it on to super.
|
|||
|
|
[super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
- (void)mapView:(AIRMap *)mapView didUpdateUserLocation:(MKUserLocation *)location
|
|||
|
|
{
|
|||
|
|
if (mapView.followUserLocation) {
|
|||
|
|
MKCoordinateRegion region;
|
|||
|
|
region.span.latitudeDelta = AIRMapDefaultSpan;
|
|||
|
|
region.span.longitudeDelta = AIRMapDefaultSpan;
|
|||
|
|
region.center = location.coordinate;
|
|||
|
|
[mapView setRegion:region animated:YES];
|
|||
|
|
|
|||
|
|
// Move to user location only for the first time it loads up.
|
|||
|
|
// mapView.followUserLocation = NO;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
- (void)mapView:(AIRMap *)mapView regionWillChangeAnimated:(__unused BOOL)animated
|
|||
|
|
{
|
|||
|
|
[self _regionChanged:mapView];
|
|||
|
|
|
|||
|
|
mapView.regionChangeObserveTimer = [NSTimer timerWithTimeInterval:AIRMapRegionChangeObserveInterval
|
|||
|
|
target:self
|
|||
|
|
selector:@selector(_onTick:)
|
|||
|
|
userInfo:@{ RCTMapViewKey: mapView }
|
|||
|
|
repeats:YES];
|
|||
|
|
|
|||
|
|
[[NSRunLoop mainRunLoop] addTimer:mapView.regionChangeObserveTimer forMode:NSRunLoopCommonModes];
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
- (void)mapView:(AIRMap *)mapView regionDidChangeAnimated:(__unused BOOL)animated
|
|||
|
|
{
|
|||
|
|
CGFloat zoomLevel = [self zoomLevel:mapView];
|
|||
|
|
[mapView.regionChangeObserveTimer invalidate];
|
|||
|
|
mapView.regionChangeObserveTimer = nil;
|
|||
|
|
|
|||
|
|
[self _regionChanged:mapView];
|
|||
|
|
|
|||
|
|
if (zoomLevel < mapView.minZoomLevel) {
|
|||
|
|
[self setCenterCoordinate:[mapView centerCoordinate] zoomLevel:mapView.minZoomLevel animated:TRUE mapView:mapView];
|
|||
|
|
}
|
|||
|
|
else if (zoomLevel > mapView.maxZoomLevel) {
|
|||
|
|
[self setCenterCoordinate:[mapView centerCoordinate] zoomLevel:mapView.maxZoomLevel animated:TRUE mapView:mapView];
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Don't send region did change events until map has
|
|||
|
|
// started rendering, as these won't represent the final location
|
|||
|
|
if (mapView.hasStartedRendering) {
|
|||
|
|
[self _emitRegionChangeEvent:mapView continuous:NO];
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
mapView.pendingCenter = mapView.region.center;
|
|||
|
|
mapView.pendingSpan = mapView.region.span;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
- (void)mapViewWillStartRenderingMap:(AIRMap *)mapView
|
|||
|
|
{
|
|||
|
|
if (!didCallOnMapReady)
|
|||
|
|
{
|
|||
|
|
didCallOnMapReady = YES;
|
|||
|
|
mapView.onMapReady(@{});
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
mapView.hasStartedRendering = YES;
|
|||
|
|
[mapView beginLoading];
|
|||
|
|
[self _emitRegionChangeEvent:mapView continuous:NO];
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
- (void)mapViewDidFinishRenderingMap:(AIRMap *)mapView fullyRendered:(BOOL)fullyRendered
|
|||
|
|
{
|
|||
|
|
[mapView finishLoading];
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
#pragma mark Private
|
|||
|
|
|
|||
|
|
- (void)_onTick:(NSTimer *)timer
|
|||
|
|
{
|
|||
|
|
[self _regionChanged:timer.userInfo[RCTMapViewKey]];
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
- (void)_regionChanged:(AIRMap *)mapView
|
|||
|
|
{
|
|||
|
|
BOOL needZoom = NO;
|
|||
|
|
CGFloat newLongitudeDelta = 0.0f;
|
|||
|
|
MKCoordinateRegion region = mapView.region;
|
|||
|
|
CGFloat zoomLevel = [self zoomLevel:mapView];
|
|||
|
|
// On iOS 7, it's possible that we observe invalid locations during initialization of the map.
|
|||
|
|
// Filter those out.
|
|||
|
|
if (!CLLocationCoordinate2DIsValid(region.center)) {
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
// Calculation on float is not 100% accurate. If user zoom to max/min and then move, it's likely the map will auto zoom to max/min from time to time.
|
|||
|
|
// So let's try to make map zoom back to 99% max or 101% min so that there are some buffer that moving the map won't constantly hitting the max/min bound.
|
|||
|
|
if (mapView.maxDelta > FLT_EPSILON && region.span.longitudeDelta > mapView.maxDelta) {
|
|||
|
|
needZoom = YES;
|
|||
|
|
newLongitudeDelta = mapView.maxDelta * (1 - AIRMapZoomBoundBuffer);
|
|||
|
|
} else if (mapView.minDelta > FLT_EPSILON && region.span.longitudeDelta < mapView.minDelta) {
|
|||
|
|
needZoom = YES;
|
|||
|
|
newLongitudeDelta = mapView.minDelta * (1 + AIRMapZoomBoundBuffer);
|
|||
|
|
}
|
|||
|
|
if (needZoom) {
|
|||
|
|
region.span.latitudeDelta = region.span.latitudeDelta / region.span.longitudeDelta * newLongitudeDelta;
|
|||
|
|
region.span.longitudeDelta = newLongitudeDelta;
|
|||
|
|
mapView.region = region;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Continuously observe region changes
|
|||
|
|
[self _emitRegionChangeEvent:mapView continuous:YES];
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
- (void)_emitRegionChangeEvent:(AIRMap *)mapView continuous:(BOOL)continuous
|
|||
|
|
{
|
|||
|
|
if (!mapView.ignoreRegionChanges && mapView.onChange) {
|
|||
|
|
MKCoordinateRegion region = mapView.region;
|
|||
|
|
if (!CLLocationCoordinate2DIsValid(region.center)) {
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
#define FLUSH_NAN(value) (isnan(value) ? 0 : value)
|
|||
|
|
mapView.onChange(@{
|
|||
|
|
@"continuous": @(continuous),
|
|||
|
|
@"region": @{
|
|||
|
|
@"latitude": @(FLUSH_NAN(region.center.latitude)),
|
|||
|
|
@"longitude": @(FLUSH_NAN(region.center.longitude)),
|
|||
|
|
@"latitudeDelta": @(FLUSH_NAN(region.span.latitudeDelta)),
|
|||
|
|
@"longitudeDelta": @(FLUSH_NAN(region.span.longitudeDelta)),
|
|||
|
|
}
|
|||
|
|
});
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/** Returns the distance of |pt| to |poly| in meters
|
|||
|
|
*
|
|||
|
|
*
|
|||
|
|
*/
|
|||
|
|
- (double)distanceOfPoint:(MKMapPoint)pt toPoly:(AIRMapPolyline *)poly
|
|||
|
|
{
|
|||
|
|
double distance = MAXFLOAT;
|
|||
|
|
for (int n = 0; n < poly.coordinates.count - 1; n++) {
|
|||
|
|
|
|||
|
|
MKMapPoint ptA = MKMapPointForCoordinate(poly.coordinates[n].coordinate);
|
|||
|
|
MKMapPoint ptB = MKMapPointForCoordinate(poly.coordinates[n + 1].coordinate);
|
|||
|
|
|
|||
|
|
double xDelta = ptB.x - ptA.x;
|
|||
|
|
double yDelta = ptB.y - ptA.y;
|
|||
|
|
|
|||
|
|
if (xDelta == 0.0 && yDelta == 0.0) {
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
double u = ((pt.x - ptA.x) * xDelta + (pt.y - ptA.y) * yDelta) / (xDelta * xDelta + yDelta * yDelta);
|
|||
|
|
MKMapPoint ptClosest;
|
|||
|
|
if (u < 0.0) {
|
|||
|
|
ptClosest = ptA;
|
|||
|
|
}
|
|||
|
|
else if (u > 1.0) {
|
|||
|
|
ptClosest = ptB;
|
|||
|
|
}
|
|||
|
|
else {
|
|||
|
|
ptClosest = MKMapPointMake(ptA.x + u * xDelta, ptA.y + u * yDelta);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
distance = MIN(distance, MKMetersBetweenMapPoints(ptClosest, pt));
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return distance;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
/** Converts |px| to meters at location |pt| */
|
|||
|
|
- (double)metersFromPixel:(NSUInteger)px atPoint:(CGPoint)pt forMap:(AIRMap *)mapView
|
|||
|
|
{
|
|||
|
|
CGPoint ptB = CGPointMake(pt.x + px, pt.y);
|
|||
|
|
|
|||
|
|
CLLocationCoordinate2D coordA = [mapView convertPoint:pt toCoordinateFromView:mapView];
|
|||
|
|
CLLocationCoordinate2D coordB = [mapView convertPoint:ptB toCoordinateFromView:mapView];
|
|||
|
|
|
|||
|
|
return MKMetersBetweenMapPoints(MKMapPointForCoordinate(coordA), MKMapPointForCoordinate(coordB));
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
+ (double)longitudeToPixelSpaceX:(double)longitude
|
|||
|
|
{
|
|||
|
|
return round(MERCATOR_OFFSET + MERCATOR_RADIUS * longitude * M_PI / 180.0);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
+ (double)latitudeToPixelSpaceY:(double)latitude
|
|||
|
|
{
|
|||
|
|
if (latitude == 90.0) {
|
|||
|
|
return 0;
|
|||
|
|
} else if (latitude == -90.0) {
|
|||
|
|
return MERCATOR_OFFSET * 2;
|
|||
|
|
} else {
|
|||
|
|
return round(MERCATOR_OFFSET - MERCATOR_RADIUS * logf((1 + sinf(latitude * M_PI / 180.0)) / (1 - sinf(latitude * M_PI / 180.0))) / 2.0);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
+ (double)pixelSpaceXToLongitude:(double)pixelX
|
|||
|
|
{
|
|||
|
|
return ((round(pixelX) - MERCATOR_OFFSET) / MERCATOR_RADIUS) * 180.0 / M_PI;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
+ (double)pixelSpaceYToLatitude:(double)pixelY
|
|||
|
|
{
|
|||
|
|
return (M_PI / 2.0 - 2.0 * atan(exp((round(pixelY) - MERCATOR_OFFSET) / MERCATOR_RADIUS))) * 180.0 / M_PI;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
#pragma mark -
|
|||
|
|
#pragma mark Helper methods
|
|||
|
|
|
|||
|
|
- (MKCoordinateSpan)coordinateSpanWithMapView:(AIRMap *)mapView
|
|||
|
|
centerCoordinate:(CLLocationCoordinate2D)centerCoordinate
|
|||
|
|
andZoomLevel:(double)zoomLevel
|
|||
|
|
{
|
|||
|
|
// convert center coordiate to pixel space
|
|||
|
|
double centerPixelX = [AIRMapManager longitudeToPixelSpaceX:centerCoordinate.longitude];
|
|||
|
|
double centerPixelY = [AIRMapManager latitudeToPixelSpaceY:centerCoordinate.latitude];
|
|||
|
|
|
|||
|
|
// determine the scale value from the zoom level
|
|||
|
|
double zoomExponent = AIRMapMaxZoomLevel - zoomLevel;
|
|||
|
|
double zoomScale = pow(2, zoomExponent);
|
|||
|
|
|
|||
|
|
// scale the map’s size in pixel space
|
|||
|
|
CGSize mapSizeInPixels = mapView.bounds.size;
|
|||
|
|
double scaledMapWidth = mapSizeInPixels.width * zoomScale;
|
|||
|
|
double scaledMapHeight = mapSizeInPixels.height * zoomScale;
|
|||
|
|
|
|||
|
|
// figure out the position of the top-left pixel
|
|||
|
|
double topLeftPixelX = centerPixelX - (scaledMapWidth / 2);
|
|||
|
|
double topLeftPixelY = centerPixelY - (scaledMapHeight / 2);
|
|||
|
|
|
|||
|
|
// find delta between left and right longitudes
|
|||
|
|
CLLocationDegrees minLng = [AIRMapManager pixelSpaceXToLongitude:topLeftPixelX];
|
|||
|
|
CLLocationDegrees maxLng = [AIRMapManager pixelSpaceXToLongitude:topLeftPixelX + scaledMapWidth];
|
|||
|
|
CLLocationDegrees longitudeDelta = maxLng - minLng;
|
|||
|
|
|
|||
|
|
// find delta between top and bottom latitudes
|
|||
|
|
CLLocationDegrees minLat = [AIRMapManager pixelSpaceYToLatitude:topLeftPixelY];
|
|||
|
|
CLLocationDegrees maxLat = [AIRMapManager pixelSpaceYToLatitude:topLeftPixelY + scaledMapHeight];
|
|||
|
|
CLLocationDegrees latitudeDelta = -1 * (maxLat - minLat);
|
|||
|
|
|
|||
|
|
// create and return the lat/lng span
|
|||
|
|
MKCoordinateSpan span = MKCoordinateSpanMake(latitudeDelta, longitudeDelta);
|
|||
|
|
return span;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
#pragma mark -
|
|||
|
|
#pragma mark Public methods
|
|||
|
|
|
|||
|
|
- (void)setCenterCoordinate:(CLLocationCoordinate2D)centerCoordinate
|
|||
|
|
zoomLevel:(double)zoomLevel
|
|||
|
|
animated:(BOOL)animated
|
|||
|
|
mapView:(AIRMap *)mapView
|
|||
|
|
{
|
|||
|
|
// clamp large numbers to 28
|
|||
|
|
zoomLevel = MIN(zoomLevel, AIRMapMaxZoomLevel);
|
|||
|
|
|
|||
|
|
// use the zoom level to compute the region
|
|||
|
|
MKCoordinateSpan span = [self coordinateSpanWithMapView:mapView centerCoordinate:centerCoordinate andZoomLevel:zoomLevel];
|
|||
|
|
MKCoordinateRegion region = MKCoordinateRegionMake(centerCoordinate, span);
|
|||
|
|
|
|||
|
|
// set the region like normal
|
|||
|
|
[mapView setRegion:region animated:animated];
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
//KMapView cannot display tiles that cross the pole (as these would involve wrapping the map from top to bottom, something that a Mercator projection just cannot do).
|
|||
|
|
-(MKCoordinateRegion)coordinateRegionWithMapView:(AIRMap *)mapView
|
|||
|
|
centerCoordinate:(CLLocationCoordinate2D)centerCoordinate
|
|||
|
|
andZoomLevel:(double)zoomLevel
|
|||
|
|
{
|
|||
|
|
// clamp lat/long values to appropriate ranges
|
|||
|
|
centerCoordinate.latitude = MIN(MAX(-90.0, centerCoordinate.latitude), 90.0);
|
|||
|
|
centerCoordinate.longitude = fmod(centerCoordinate.longitude, 180.0);
|
|||
|
|
|
|||
|
|
// convert center coordiate to pixel space
|
|||
|
|
double centerPixelX = [AIRMapManager longitudeToPixelSpaceX:centerCoordinate.longitude];
|
|||
|
|
double centerPixelY = [AIRMapManager latitudeToPixelSpaceY:centerCoordinate.latitude];
|
|||
|
|
|
|||
|
|
// determine the scale value from the zoom level
|
|||
|
|
double zoomExponent = AIRMapMaxZoomLevel - zoomLevel;
|
|||
|
|
double zoomScale = pow(2, zoomExponent);
|
|||
|
|
|
|||
|
|
// scale the map’s size in pixel space
|
|||
|
|
CGSize mapSizeInPixels = mapView.bounds.size;
|
|||
|
|
double scaledMapWidth = mapSizeInPixels.width * zoomScale;
|
|||
|
|
double scaledMapHeight = mapSizeInPixels.height * zoomScale;
|
|||
|
|
|
|||
|
|
// figure out the position of the left pixel
|
|||
|
|
double topLeftPixelX = centerPixelX - (scaledMapWidth / 2);
|
|||
|
|
|
|||
|
|
// find delta between left and right longitudes
|
|||
|
|
CLLocationDegrees minLng = [AIRMapManager pixelSpaceXToLongitude:topLeftPixelX];
|
|||
|
|
CLLocationDegrees maxLng = [AIRMapManager pixelSpaceXToLongitude:topLeftPixelX + scaledMapWidth];
|
|||
|
|
CLLocationDegrees longitudeDelta = maxLng - minLng;
|
|||
|
|
|
|||
|
|
// if we’re at a pole then calculate the distance from the pole towards the equator
|
|||
|
|
// as MKMapView doesn’t like drawing boxes over the poles
|
|||
|
|
double topPixelY = centerPixelY - (scaledMapHeight / 2);
|
|||
|
|
double bottomPixelY = centerPixelY + (scaledMapHeight / 2);
|
|||
|
|
BOOL adjustedCenterPoint = NO;
|
|||
|
|
if (topPixelY > MERCATOR_OFFSET * 2) {
|
|||
|
|
topPixelY = centerPixelY - scaledMapHeight;
|
|||
|
|
bottomPixelY = MERCATOR_OFFSET * 2;
|
|||
|
|
adjustedCenterPoint = YES;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// find delta between top and bottom latitudes
|
|||
|
|
CLLocationDegrees minLat = [AIRMapManager pixelSpaceYToLatitude:topPixelY];
|
|||
|
|
CLLocationDegrees maxLat = [AIRMapManager pixelSpaceYToLatitude:bottomPixelY];
|
|||
|
|
CLLocationDegrees latitudeDelta = -1 * (maxLat - minLat);
|
|||
|
|
|
|||
|
|
// create and return the lat/lng span
|
|||
|
|
MKCoordinateSpan span = MKCoordinateSpanMake(latitudeDelta, longitudeDelta);
|
|||
|
|
MKCoordinateRegion region = MKCoordinateRegionMake(centerCoordinate, span);
|
|||
|
|
// once again, MKMapView doesn’t like drawing boxes over the poles
|
|||
|
|
// so adjust the center coordinate to the center of the resulting region
|
|||
|
|
if (adjustedCenterPoint) {
|
|||
|
|
region.center.latitude = [AIRMapManager pixelSpaceYToLatitude:((bottomPixelY + topPixelY) / 2.0)];
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return region;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
- (double) zoomLevel:(AIRMap *)mapView {
|
|||
|
|
MKCoordinateRegion region = mapView.region;
|
|||
|
|
|
|||
|
|
double centerPixelX = [AIRMapManager longitudeToPixelSpaceX: region.center.longitude];
|
|||
|
|
double topLeftPixelX = [AIRMapManager longitudeToPixelSpaceX: region.center.longitude - region.span.longitudeDelta / 2];
|
|||
|
|
|
|||
|
|
double scaledMapWidth = (centerPixelX - topLeftPixelX) * 2;
|
|||
|
|
CGSize mapSizeInPixels = mapView.bounds.size;
|
|||
|
|
double zoomScale = scaledMapWidth / mapSizeInPixels.width;
|
|||
|
|
double zoomExponent = log(zoomScale) / log(2);
|
|||
|
|
double zoomLevel = AIRMapMaxZoomLevel - zoomExponent;
|
|||
|
|
|
|||
|
|
return zoomLevel;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
@end
|