ios - 使用iOS版Google Maps API无法获取当前位置坐标

Question

我尝试了以下代码:

- (void)viewDidLoad
{
    [super viewDidLoad];
    mapView_.myLocationEnabled = YES;

    CLLocation *myLocation = mapView_.myLocation;
    NSLog(@"%f %f",myLocation.coordinate.latitude, myLocation.coordinate.longitude);
}

正在记录的输出为0.000000 0.000000。

我还检查了设置，启用了位置服务，并且还显示了我的应用已启用。

请帮助我找出我要去哪里。

Answer 1

在viewDidLoad中始终显示为0，0，您将不得不使用KVO来观察坐标。尝试以下代码:-

-(void)viewWillAppear:(BOOL)animated{
    [super viewWillAppear:animated];
    [self.mapView addObserver:self forKeyPath:@"myLocation" options:NSKeyValueObservingOptionNew context: nil];
}

-(void)viewWillDisappear:(BOOL)animated{
    [super viewWillDisappear:animated];
    [self.mapView removeObserver:self forKeyPath:@"myLocation"];
}

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
{
    if ([keyPath isEqualToString:@"myLocation"] && [object isKindOfClass:[GMSMapView class]])
    {
        NSLog(@"KVO triggered. Location Latitude: %f Longitude: %f",self.mapView.myLocation.coordinate.latitude,self.mapView.myLocation.coordinate.longitude);
    }
}