Question

我是一个新的谷歌地图sdk for ios.I在视图上添加了一个地图。当我输入这个mapView时，我想定位自己。所以我写道：

GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:-33.8683
                                                        longitude:151.2086
                                                             zoom:6];
_iMapView = [GMSMapView mapWithFrame:CGRectMake(0, 0, 320, 480) camera:camera];
self.iMapView.myLocationEnabled = YES;
self.iMapView.delegate=self;

GMSMarkerOptions *annotation = [[GMSMarkerOptions alloc] init];
annotation.position = CLLocationCoordinate2DMake(-33.8683, 151.2086);
annotation.title = @"Sydney";
annotation.snippet = @"Australia";
//annotation.infoWindowAnchor=CGPointMake(0.5, 0.5);
[self.iMapView addMarkerWithOptions:annotation];

//[self.view  addSubview:self.iMapView];
self.view=self.iMapView;

但是我在坐标（33.8683,151.2086）中找到了mapView视图，我只想将mapView移动到wyposition。我也发现谷歌没有回调功能参考
self.iMapView.myLocationEnabled = YES;

谢谢你的回复。

Answer 1

要将相机设置为当前位置的动画/设置，首先必须：

self.googleMapsView.myLocationEnabled = YES;

然后在GMSMapView头文件的文档中，您将找到以下注释：

/**
* If My Location is enabled, reveals where the user location dot is being
* drawn. If it is disabled, or it is enabled but no location data is available,
* this will be nil.  This property is observable using KVO.
*/ 
@property (nonatomic, strong, readonly) CLLocation *myLocation;

因此，您可以在viewWillAppear方法中设置键值观察器，然后使用GoogleMaps SDK的位置管理器更新您的位置。

- (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]
}

然后观察房产。

- (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中取消注册观察者。

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

祝你好运

Answer 2

注意：这个答案是错误的，请参阅Robert的回答。

适用于iOS的Google Maps SDK没有任何代表可以在设备位置发生变化时通知您。

您需要自己使用CLLocationManager课程，以获取设备的当前位置，然后更新地图视图。

<强>更新

要从位置管理器提供的新CLLocation更新地图视图，您可以执行以下操作：

GMSMapView* mapView = ...;
CLLocation* location = ...;
GMSCameraPosition* camera = [GMSCameraPosition 
    cameraWithLatitude: location.coordinate.latitude
    longitude: location.coordinate.longitude
    zoom: 6];
mapView.camera = camera;

或者，如果您希望地图视图设置为新位置的动画，请使用以下命令：

[mapView animationToCameraPosition: camera];

关于定位自己，一些问题

2 个答案: