我目前正在我的项目中使用 Google Maps API。我正在尝试将默认相机/变焦设置为用户位置。我这样做：
@implementation ViewController{
GMSMapView *mapView_;
}
@synthesize currentLatitude,currentLongitude;
- (void)viewDidLoad
{
[super viewDidLoad];
mapView_.settings.myLocationButton = YES;
mapView_.myLocationEnabled = YES;
}
- (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:myLocation.coordinate.latitude
longitude:myLocation.coordinate.longitude
zoom:6];
mapView_ = [GMSMapView mapWithFrame:CGRectZero camera:camera];
self.view = mapView_;
NSLog(@"%f, %f", myLocation.coordinate.latitude, myLocation.coordinate.longitude);
}
但是，它不起作用，因为当我这样做时
NSLog(@"%f, %f", myLocation.coordinate.latitude, myLocation.coordinate.longitude);
它返回 0, 0，并且不给出当前位置坐标。如何正确获取用户的坐标？
.h
#import <CoreLocation/CoreLocation.h>
@property(nonatomic,retain) CLLocationManager *locationManager;
.m
- (NSString *)deviceLocation
{
NSString *theLocation = [NSString stringWithFormat:@"latitude: %f longitude: %f", locationManager.location.coordinate.latitude, locationManager.location.coordinate.longitude];
return theLocation;
}
- (void)viewDidLoad
{
locationManager = [[CLLocationManager alloc] init];
locationManager.distanceFilter = kCLDistanceFilterNone;
locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters; // 100 m
[locationManager startUpdatingLocation];
}
回答了here https://stackoverflow.com/questions/13491411/iphone-app-how-to-get-the-current-location-only-once-and-store-that-to-be-used.
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