- (void)initMapView

{

    [MAMapServices sharedServices].apiKey = APIKey;

    _mapView = [[MAMapView alloc] initWithFrame:CGRectMake(0, 0, CGRectGetWidth(self.view.bounds), CGRectGetHeight(self.view.bounds))];

    _mapView.delegate = self;

    _mapView.compassOrigin = CGPointMake(_mapView.compassOrigin.x, 22);

    _mapView.scaleOrigin = CGPointMake(_mapView.scaleOrigin.x, 22);

    [self.view addSubview:_mapView];

    _mapView.showsUserLocation = YES;

}

为什么我定不了位啊？？

求解