如何在谷歌地圖iOS中找到當前位置？

Question

如何在谷歌地圖中顯示用戶的當前位置？

我必須閱讀此表格GPS嗎？

Answer 1

要移至當前位置，您必須：

self.googleMapsView.myLocationEnabled = YES;

然后，您可以在viewWillAppear方法中設置鍵值觀察器，然后使用GoogleMaps SDK的位置管理器獲取位置更新。

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

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

然后觀察物業。

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

不要忘記在viewWillDisappear中取消注冊觀察者。

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

基於Weindl的回答。

Answer 2

使用CLLocationManagerDelegate和CLLocationManager獲取坐標然后將它們注入GMSMapView的最佳方式和最簡單的方法：

- (void)viewDidLoad
{
    [super viewDidLoad];
    locationManager = [[CLLocationManager alloc] init];
    locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    locationManager.delegate = self;
    [locationManager startUpdatingLocation];

    GMSCameraPosition *camera = [GMSCameraPosition cameraWithTarget:CLLocationCoordinate2DMake(0, 0) zoom: 10];
    mapView = [GMSMapView mapWithFrame:self.viewForMap.bounds camera:camera];
    mapView.myLocationEnabled = YES;
    [self.viewForMap addSubview:mapView];
}


- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
    CLLocation *currentLocation = [locations lastObject];
    [mapView animateToLocation:currentLocation.coordinate];
}

Answer 3

... NSKeyValueObservingOptionNew

折舊。

使用，例如：

[self.googleMapsView addObserver:self forKeyPath:@"myLocation" options:NSKeyValueObservingOptionNew context:nil];

Answer 4

//In viewDidLoad
self.mapView.myLocationEnabled = YES;

//Whenever you need to check location
CLLocation *myLocation = self.mapView.myLocation;
NSLog(@"%f %f",myLocation.coordinate.latitude, myLocation.coordinate.longitude);

Answer 5

(void)updateCurrentLocation {

    CLLocationManager *locationManager = [[CLLocationManager alloc] init];
    [locationManager startUpdatingLocation];
    CLLocation *location = [locationManager location];
    CLLocationCoordinate2D currentLocation = [location coordinate];
    if(noStartSet){
        startPoint = currentLocation;
        noStartSet = FALSE;
    }
    [self.mapView animateToLocation:currentLocation];    
}

如果您希望當前位置為默認位置，請在viewdidload調用此方法。