title: Smoothly Animate in GMS poly line using google direction api from steps point poly line in iOS
body: <p>I am trying to move smoothly animated polyline with using google direction api. From API Response, I am getting each polyline points from steps of legs Array. As Written code below , output of animation polyline is not moving continously as I want, So give any idea for regular or continuous movement of poly line on drawn route.</p>
  
  <pre><code>var gmsPath = GMSMutablePath()
  var path = GMSPath()
  var polyline = GMSPolyline()
  var animationPath = GMSMutablePath()
  var animationPolyline = GMSPolyline()
  
  func polyline(){
  
  self.createPolyline(arrStep: arrPath, complitionBlock: { (success) in
          if success{
                      print("Success")
                      self.timer = Timer.scheduledTimer(timeInterval: 0.3, target: self, selector: #selector(self.animatePath), userInfo: nil, repeats: true)
                     }else{
                          print("Did not success")
                      }
                  })
   }
  
  ////Create Polyline On MAP
  
  func createPolyline(arrStep:[String],complitionBlock : @escaping (Bool)-&gt;Void){
  
      for points in arrStep{
  
          self.gmsPath.appendPath(path: GMSMutablePath(fromEncodedPath: points))
          self.polyline.path = gmsPath
          self.polyline.strokeColor = UIColor.blue
          self.polyline.strokeWidth = 4.0
          self.polyline.map = self.gmsMapView
      }
      complitionBlock(true)
  }
  ////Animate Path In Polyline
  
  @objc func animatePath() {
  
      if (self.i &lt; self.gmsPath.count()){
          self.animationPath.add(self.gmsPath.coordinate(at: UInt(self.i)))
          self.animationPolyline.path = self.animationPath
          self.animationPolyline.strokeColor = UIColor.purple
          self.animationPolyline.strokeWidth = 4
          self.animationPolyline.map = self.gmsMapView
          self.i += 1
      }else{
          self.i = 0
          self.animationPath = GMSMutablePath()
          self.animationPolyline.map = nil
      }
  
  }
  </code></pre>