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61 lines
1.8 KiB
61 lines
1.8 KiB
2 years ago
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#if !defined(__has_feature) || !__has_feature(objc_arc)
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#error "This file requires ARC support."
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#endif
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#import "GoogleMapsDemos/Samples/MyLocationViewController.h"
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#import <GoogleMaps/GoogleMaps.h>
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@implementation MyLocationViewController {
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GMSMapView *_mapView;
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BOOL _firstLocationUpdate;
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}
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- (void)viewDidLoad {
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[super viewDidLoad];
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GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:-33.868
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longitude:151.2086
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zoom:12];
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_mapView = [GMSMapView mapWithFrame:CGRectZero camera:camera];
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_mapView.settings.compassButton = YES;
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_mapView.settings.myLocationButton = YES;
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// Listen to the myLocation property of GMSMapView.
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[_mapView addObserver:self
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forKeyPath:@"myLocation"
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options:NSKeyValueObservingOptionNew
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context:NULL];
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self.view = _mapView;
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// Ask for My Location data after the map has already been added to the UI.
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dispatch_async(dispatch_get_main_queue(), ^{
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_mapView.myLocationEnabled = YES;
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});
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}
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- (void)dealloc {
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[_mapView removeObserver:self
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forKeyPath:@"myLocation"
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context:NULL];
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}
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#pragma mark - KVO updates
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- (void)observeValueForKeyPath:(NSString *)keyPath
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ofObject:(id)object
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change:(NSDictionary *)change
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context:(void *)context {
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if (!_firstLocationUpdate) {
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// If the first location update has not yet been recieved, then jump to that
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// location.
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_firstLocationUpdate = YES;
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CLLocation *location = [change objectForKey:NSKeyValueChangeNewKey];
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_mapView.camera = [GMSCameraPosition cameraWithTarget:location.coordinate
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zoom:14];
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}
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}
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@end
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