如何平滑移动GMSMarker沿着目标c中的坐标 [英] How to smoothly move GMSMarker along coordinates in Objective c

问题描述

我正在使用google map sdk。我想每5秒更新一次pin的gps坐标。目前我只是更新GMSMarker的位置属性。但它会产生跳跃效应。我想在地图上平滑地移动标记。

这里是我的代码来更新标记的位置

   - （void）updateLocationoordinates（CLLocationCoordinate2D）坐标
 {
 if（marker == nil）{
 marker = [GMSMarker markerWithPosition：coordinates]; 
 marker.icon = [UIImage imageNamed：CAR_FOUND_IMAGE]; 
 marker.map = mapView_; 
} else 
 marker.position = coordinates; 
 
  

解决方案

更多类似这样的内容：

  [CATransaction begin]; 
 [CATransaction setAnimationDuration：2.0]; 
 marker.position = coordindates; 
 [CATransaction commit]; 
  

我们使您可以使用核心动画，用于动画Google地图。

对于一个工作示例，请参阅SDK示例应用程序中的 AnimatedCurrentLocationViewController。{c，m} p>

I'm using google map sdk. I want to update gps coordinates of pin after each 5 seconds. Currently I'm just updating position attribute of GMSMarker. But it gives jump effect. I want to move marker smoothly on map.
Here is my code to update position of marker

-(void)updateLocationoordinates(CLLocationCoordinate2D) coordinates
{ 
  if (marker == nil) {
      marker = [GMSMarker markerWithPosition:coordinates];
      marker.icon = [UIImage imageNamed:CAR_FOUND_IMAGE];
      marker.map = mapView_;
  } else
  marker.position = coordinates; 
}

解决方案

Change your else block to be something more like this:

[CATransaction begin];
[CATransaction setAnimationDuration:2.0];
marker.position = coordindates;
[CATransaction commit];

We enable you to use Core Animation for animating Google Maps.

For a worked sample, please see AnimatedCurrentLocationViewController.{c,m} in the SDK sample application.

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