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如何在谷歌地图中显示用户的当前位置？

我必须阅读此表格 GPS 吗？

4

5 回答 5

7

要移动到当前位置，您必须：

self.googleMapsView.myLocationEnabled = YES;

然后，您可以在 viewWillAppear 方法中设置键值观察器，然后使用 GoogleMaps SDK 的位置管理器获取位置更新。

- (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]
}

然后观察属性。

- (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]];
    }
}

不要忘记在 viewWillDisappear 中注销您的观察者。

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

基于Weindl的回答。

于 2013-05-08T19:21:00.407 回答
4

使用 CLLocationManagerDelegate 和 CLLocationManager 获取坐标然后将它们注入 GMSMapView 的最佳方法和最简单的方法：

- (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];
}
于 2014-03-04T07:16:44.427 回答
1 
... NSKeyValueObservingOptionNew

已贬值。

使用，例如：

[self.googleMapsView addObserver:self forKeyPath:@"myLocation" options:NSKeyValueObservingOptionNew context:nil];
于 2013-06-10T09:01:50.063 回答
1 
//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);
于 2013-06-10T11:02:02.337 回答
0 
(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];    
}

viewdidload如果您希望您的当前位置作为默认位置，请在您的中调用此方法。

于 2016-02-12T10:39:28.033 回答