about positioning myself,some problems
问题 I am a new to google map sdk for ios.I have added a map on a view.When I enter this mapView,I want to positioning myself.So I wrote : GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:-33.8683 longitude:151.2086 zoom:6]; _iMapView = [GMSMapView mapWithFrame:CGRectMake(0, 0, 320, 480) camera:camera]; self.iMapView.myLocationEnabled = YES; self.iMapView.delegate=self; GMSMarkerOptions *annotation = [[GMSMarkerOptions alloc] init]; annotation.position = CLLocationCoordinate2DMake