用户坐标objective-C Google Maps API

我无法在Google Maps API中更改相机的值。因此，只要您打开应用程序，使用CoreLocation并将这些值传递到相机，它就会显示用户的位置。我在网上看了一些教程，但我还没有设法解决它。用户坐标objective-C Google Maps API

我试图做一个方法，观察GPS坐标已被发现，然后将它们传递给相机。但它仍然显示0,0。

@implementation HMSBViewController{ 

    CLLocationManager *_locationManager; 
} 

@synthesize mapView; 

- (NSString *)deviceLocation 
{ 
    NSString *theLocation = [NSString stringWithFormat:@"latitude: %f longitude: %f", _locationManager.location.coordinate.latitude, _locationManager.location.coordinate.longitude]; 
    return theLocation; 
} 

- (void)viewDidLoad 
{ 

    mapView.delegate = self; 
    //[mapView addObserver:self forKeyPath:@"myLocation" options:0 context:nil]; 

    //mapView.settings.myLocationButton = YES; 
    mapView.myLocationEnabled = YES; 
    _locationManager = [[CLLocationManager alloc] init]; 
    _locationManager.distanceFilter = kCLDistanceFilterNone; 
    _locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation;  // Setting the accuracy to the best possible 


    if([_locationManager respondsToSelector:@selector(requestAlwaysAuthorization)]) { 
    [_locationManager requestAlwaysAuthorization]; 
    } 

    [_locationManager startUpdatingLocation]; 

} 

- (void)viewWillAppear{ 

    [mapView addObserver:self forKeyPath:@"myLocation" options:0 context:nil]; 

} 

- (void)loadView{ 

    CLLocation *myLocation = mapView.myLocation; 

    GMSMarker *marker = [[GMSMarker alloc] init]; 
    marker.position =  CLLocationCoordinate2DMake(myLocation.coordinate.latitude,  myLocation.coordinate.longitude); 
    marker.title = @"Current Location"; 
    marker.map = mapView; 
    GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:_locationManager.location.coordinate.latitude 
                  longitude:_locationManager.location.coordinate.longitude 
                   zoom:1]; 
    mapView = [GMSMapView mapWithFrame:CGRectZero camera:camera]; 


    self.view = mapView; 
    NSLog(@"%f, %f", _locationManager.location.coordinate.latitude, _locationManager.location.coordinate.longitude); 

} 

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context { 
    if([keyPath isEqualToString:@"myLocation"]) { 
     CLLocation *location = [object myLocation]; 
     CLLocationCoordinate2D target = CLLocationCoordinate2DMake(location.coordinate.latitude, location.coordinate.longitude); 

     [mapView animateToLocation:target]; 

     @try { 
      [mapView removeObserver:self forKeyPath:@"myLocation"]; 
     } @catch(id exception){ 
      ; 
     } 
    } 
    }

任何建议将不胜感激！

来源

2015-05-13 Josh451

1. loadView将在viewDidLoad之前被调用。 2.在loadView中，您正在访问mapView.myLocation _before_ mapView已创建（稍后以相同的方法）并且_before_位置管理器已启动（在viewDidLoad中）。 – Anna

[获取当前位置iOS，Google Maps API的坐标]的可能重复（http://stackoverflow.com/questions/30212190/getting-coordinates-of-current-location-ios-google-maps-api） – friedbunny

您需要设置的LocationManager委托，然后使用委托方法

-(void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation

检索位置。一旦你有了位置，然后调用你的地图函数来填充谷歌

来源

2015-05-13 20:27:22 rmp

用户坐标objective-C Google Maps API

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