mylocationButton不更新我的位置爲什麼？

Question

因爲我已經用我的位置按鈕，此方法...

[mapView.settings setMyLocationButton:YES]; 

//AddObserverForDriverCurrentLocation 
[mapView addObserver:self forKeyPath:@"myLocation" options:NSKeyValueObservingOptionNew context:NULL]; 

[self.view addSubview:mapView]; 

dispatch_async(dispatch_get_main_queue(), ^{ 
    mapView.myLocationEnabled = YES; 
}); 

- (void)locationManager:(CLLocationManager *)manager didUpdateLocations: 
(NSArray<CLLocation *> *)locations 
{ 

NSLog(@"Locations:%@",[locations lastObject]); 


} 



- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context { 

if([keyPath isEqualToString:@"myLocation"]) { 
    CLLocation *location = [object myLocation]; 
    NSLog(@"Location, %@,", location); 

    CLLocationCoordinate2D target = 
    CLLocationCoordinate2DMake(22.7,75.8); 

    [mapView animateToLocation:target]; 
    [mapView animateToZoom:17]; 
} 
} 

但是，當我在myLocation按鈕點擊它是不是uspdating我的位置，請幫助

Answer 1

試試這個

要移到您現在的位置，你必須：

mapView.myLocationEnabled = YES; 

然後你可以設置你的viewWillAppear方法鍵值觀察器，然後喲您可以使用GoogleMaps SDK的位置管理器獲取您的位置信息。

- (void)viewWillAppear:(BOOL)animated 
{ 
    [super viewWillAppear:animated]; 

    // Implement here to check if already KVO is implemented. 
    ... 
    [mapView addObserver:self forKeyPath:@"myLocation" options: NSKeyValueObservingOptionNew context: nil] 
} 

然後觀察屬性。

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context 
{ 
    if ([keyPath isEqualToString:@"myLocation"] && [object isKindOfClass:[GMSMapView class]]) 
    { 
     [mapView animateToCameraPosition:[GMSCameraPosition cameraWithLatitude: mapView.myLocation.coordinate.latitude 
                       longitude: mapView.myLocation.coordinate.longitude 
                         zoom: mapView.projection.zoom]]; // check that the zoom property once 
    } 
} 

不要忘記在viewWillDisappear中註銷您的觀察者。

- (void)viewWillDisappear:(BOOL)animated 
{ 
    [super viewWillDisappear:animated]; 
    // Implement here if the view has registered KVO 
    ... 
    [mapView removeObserver:self forKeyPath:@"myLocation"]; 
}