Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
794 views
in Technique[技术] by (71.8m points)

google maps - How to smoothly move GMSMarker along coordinates in Objective c

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; 
}
See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

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.


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...