ios - MKMapView setRegion 如何停止动画

Question

你能帮帮我吗？我需要停止 MkMapView 方法 setRegion:region animated: true。我需要设置新区域动画并选择停止它。谢谢。

Answer 1

如果您创建另一个动画但针对与现有动画不同的区域，这将使现有动画无效。注意:如果我尝试创建一个新动画，但对于相同的 visibleMapRect，iOS 将忽略它。

func stopZoom() {
  //the trick: creating a region very similar to the existing one
  var mapRegion:MKCoordinateRegion = MKCoordinateRegionForMapRect(self.mapView.visibleMapRect)
  mapRegion.span.latitudeDelta = mapRegion.span.latitudeDelta + 0.000001

  UIView.animateWithDuration(0.1, delay: 0.0, options: [], animations: {
    let mapRegion:MKCoordinateRegion = mapRegion 
    self.mapView.setRegion(mapRegion, animated: true) //this will invalidate the other animations
  }) { (completed: Bool) -> Void in
}

引用startZoom方法:

func startZoom() {
  UIView.animateWithDuration(10, delay: 0.0, options: [UIViewAnimationOptions.CurveLinear, UIViewAnimationOptions.AllowUserInteraction, UIViewAnimationOptions.BeginFromCurrentState], animations: {
  let mapRegion:MKCoordinateRegion = MKCoordinateRegionMakeWithDistance(self.coordinate, 500, 500)
  self.mapView.setRegion(mapRegion, animated: true)
  }) { (completed: Bool) -> Void in
}

花了很多时间弄明白了，希望对你有所帮助。