ios Google Map - 如何在不缩放到相机的情况下获取我的设备位置

Question

我正在研究按钮以定期获取我的位置。在实现方面，即使不使用 GMSCameraUpdate 进行对焦，设备也会让 Google Map 相机定期位于 map 中心。您能否告诉我需要增强哪些功能，以便我们可以在不使用相机缩放的情况下定期获取更新的设备位置？

下面是我在onClick之后触发缩放的工作

 if(self.myMapView.myLocation !=nil){
        [self.locationManager stopUpdatingLocation];
        [CATransaction begin];
        [CATransaction setAnimationDuration:0.2];
        GMSCameraUpdate *move = [GMSCameraUpdate setTarget:self.myMapView.myLocation.coordinate  zoom:self.myMapView.camera.zoom];
        [self.myMapView animateWithCameraUpdate:move];
        [CATransaction commit];
    }

获取位置后委托(delegate)

- (void)locationManager:(CLLocationManager *)manager
     didUpdateLocations:(NSArray *)locations{
    CLLocation *location = [locations lastObject];


    if(location==nil){
        location = self.myMapView.myLocation;
    }

    myDeviceLocation = location;

    NSLog(@"adasdads zoom ");
    if (markera == nil) {
        markera = [[GMSMarker alloc] init] ;
        markera.position   = CLLocationCoordinate2DMake(22.2855200, 114.1576900);
        markera.groundAnchor = CGPointMake(0.5f, 0.97f); // Taking into account walker's shadow

        markera.map = self.myMapView;


    }else {
        [CATransaction begin];
        [CATransaction setAnimationDuration:2.0];
        markera.position = location.coordinate;
        markera.icon = nil;
        [CATransaction commit];

    }

    GMSCameraUpdate *move = [GMSCameraUpdate setTarget:location.coordinate zoom:17];
    [self.myMapView animateWithCameraUpdate:move];
}



-(void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)statusX {

    NSLog(@"status  : %d" , statusX);
    if (status == kCLAuthorizationStatusDenied) {
        //location denied, handle accordingly
        NSLog(@"denied ");

    }
else if (statusX == kCLAuthorizationStatusAuthorized) {
    //hooray! begin startTracking
    NSLog(@"proceed ");
    dispatch_async(dispatch_get_main_queue(), ^{
        self.myMapView.myLocationEnabled = YES;
    });



}else   if (statusX == kCLAuthorizationStatusAuthorizedAlways || statusX == kCLAuthorizationStatusAuthorizedWhenInUse) {
    self.myMapView.myLocationEnabled = YES;

    NSLog(@"gogogo ");
    dispatch_async(dispatch_get_main_queue(), ^{
      //  self.myMapView.myLocationEnabled = YES;
    });

Answer 1

你可以试试这个

从您的 didUpdateLocations 委托(delegate)中删除此代码:

GMSCameraUpdate *move = [GMSCameraUpdate setTarget:location.coordinate zoom:17];
[self.myMapView animateWithCameraUpdate:move];

将其移至您稍后可以调用的新函数。

在 didUpdateLocations 中设置新的用户位置，然后调用 [locationManager stopUpdatingLocation]，然后调用新的自定义函数来设置相机。

在新的自定义函数中，更改:

[self.myMapView animateWithCameraUpdate:move];

收件人:

CLLocationCoordinate2D target = myLocation;  //2d coord
self.myMapView.camera = [GMSCameraPosition cameraWithTarget:target zoom:17];