Question

我是通过objective-c在iPhone应用中使用谷歌地图，没关系，标记位于给定位置。我想在点击特定位置时通过单击地图将标记位置更改为所选位置。这该怎么做？提前谢谢。

我的代码：

GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:29.964996
                                                        longitude:30.939680 zoom:5
                                                          bearing:0
                                                     viewingAngle:0
                             ];
_mapView = [GMSMapView mapWithFrame:viewOfMap.bounds camera:camera];
_mapView.autoresizingMask = UIViewAutoresizingFlexibleWidth|
UIViewAutoresizingFlexibleHeight;


[_mapView addObserver:self
           forKeyPath:@"myLocation"
              options:NSKeyValueObservingOptionNew
              context:NULL];

[viewOfMap addSubview:_mapView];


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

GMSMarker *marker = [[GMSMarker alloc] init];
marker.position = CLLocationCoordinate2DMake(lat, lag);
marker.map = _mapView;

Answer 1

- (BOOL)mapView:(GMSMapView *)mapView didTapMarker:(GMSMarker *)marker
{
     marker.icon=[UIImage imageNamed:@"selectedicon.png"];//selected marker

     for (int i=0; i<[markerArray count]; i++) 
     {
         GMSMarker *unselectedMarker=markerArray[i];
         //check selected marker and unselected marker position
         if(unselectedMarker.position.latitude!=marker.position.latitude &&    unselectedMarker.position.longitude!=marker.position.longitude)
         {
             unselectedMarker.icon=[UIImage imageNamed:@"unselectedicon.png"];
         } 
     }
     return NO;
}

Answer 2

如果我理解了您的问题，您想要点按某个位置并让标记移动到该位置。

确保视图控制器实现GMSMapViewDelegate并使用didTapAtCoordinate委托方法。像这样：

-(void)mapView:(GMSMapView *)mapView didTapAtCoordinate:(CLLocationCoordinate2D)coordinate {
    [marker setPosition:coordinate];
}

通过onClick谷歌地图ios更改标记位置

2 个答案: