将CLLocationCoordinate2D坐标转换为CGPoint Swift

问题描述：

我在iOS Swift应用中有Google Map。我正在尝试为我当前的用户坐标获取CGPoint位置，以便我可以应用一些动画。但我无法在CGPoint中获得我的坐标位置。将CLLocationCoordinate2D坐标转换为CGPoint Swift

我基本上试图为我当前的用户标记添加脉冲动画。这里是我的动画代码 -

class Pulsing: CALayer { 
    var animationGroup = CAAnimationGroup() 

    var initialPulseSacle:Float = 0 
    var nextPluseAfter:TimeInterval = 0 
    var animationDuration:TimeInterval = 1.5 
    var radius:CGFloat = 200 
    var numberOfPulse:Float = Float.infinity 

    override init(layer: Any) { 
     super.init(layer: layer) 
    } 

    required init?(coder aDecoder: NSCoder) { 
     super.init(coder: aDecoder) 
    } 

    init(numberOfPulse:Float = Float.infinity, radius:CGFloat, position:CGPoint){ 
      super.init() 
      self.backgroundColor = UIColor.blue.cgColor 
      self.contentsScale = UIScreen.main.scale 
      self.opacity = 0 
      self.radius = radius 
      self.position = position 

      self.bounds = CGRect(x: 0, y: 0, width: radius*2, height: radius*2) 
      self.cornerRadius = radius 

      DispatchQueue.global(qos: DispatchQoS.QoSClass.default).async { 
       self.setupAnimationGroup() 

       DispatchQueue.main.async { 
        self.add(self.animationGroup, forKey: "pulse") 
       } 
      } 

    } 
    func createScaleAnimation() -> CABasicAnimation{ 
     let scaleAnimation = CABasicAnimation(keyPath: "transferm.scale.xy") 
     scaleAnimation.fromValue = NSNumber(value: initialPulseSacle) 
     scaleAnimation.toValue = NSNumber(value: 1) 
     scaleAnimation.duration = animationDuration 
     return scaleAnimation 
    } 
    func createOpacityAnimation() -> CAKeyframeAnimation{ 
     let opacityAnimation = CAKeyframeAnimation(keyPath: "opacity") 
     opacityAnimation.duration = animationDuration 
     opacityAnimation.values = [4.0, 8.0, 0] 
     opacityAnimation.keyTimes = [0, 0.2, 1] 
     return opacityAnimation 
    } 

    func setupAnimationGroup(){ 
     self.animationGroup = CAAnimationGroup() 
     self.animationGroup.duration = animationDuration + nextPluseAfter 
     self.animationGroup.repeatCount = numberOfPulse 
     let defaultCurve = CAMediaTimingFunction(name: kCAMediaTimingFunctionDefault) 
     self.animationGroup.timingFunction = defaultCurve 
     self.animationGroup.animations = [createScaleAnimation(),createOpacityAnimation()] 
    } 

}

然后这是我打电话在我的设置标记方法 -

func setuplocationMarker(coordinate: CLLocationCoordinate2D,address:String) { 
     locationMarker = GMSMarker(position: coordinate) 
     locationMarker.map = viewMap 
     locationMarker.title = address 
     locationMarker.appearAnimation = GMSMarkerAnimation.pop 
     locationMarker.icon = GMSMarker.markerImage(with: UIColor.red) 
     locationMarker.opacity = 0.75 

     let pulse = Pulsing(numberOfPulse: 1, radius: 80, position:CGPoint(x: CGFloat(Float(coordinate.latitude)), y: CGFloat(Float(coordinate.longitude)))) 
     pulse.animationDuration = 0.8 
     pulse.backgroundColor = UIColor.blue.cgColor 
     self.view.layer.insertSublayer(pulse, below: locationMarker.layer) 
    }

有了这个代码，它显示了在顶端让拐角处的脉冲动画，不在位置标记周围。我如何为我的标记获得正确的cgpoint位置。提前致谢！

的可能的复制[如何获得与谷歌地图SDK适用于iOS的位置CGPoint？]（HTTPS ：//stackoverflow.com/questions/15066567/how-to-get-cgpoint-of-location-with-google-maps-sdk-for-ios） –

检查此答案：https：//stackoverflow.com/a/ 15013705/3824808 –

答

通过使用纬度和经度，您不能直接将CLLocationCoordinate2D转换为CGPoint。大多数地图API将为您提供一种方法。

Google's Map API提供pointFromCoordinate，它在GMSMapView的框架中创建了CGPoint。这是GMSProjection上的一种方法，您可以从GMSMapView上的“投影”属性中获取该方法。

然后，您可以翻译成另一种UIView坐标空间使用苹果的convertPoint:toView: 例如：

let location = mapView.userLocation 
let point = mapView.projection.pointFromCoordinate(location.coordinate) 
let pointInNewView = newView.convert(point, from: mapView)

解决它！万分感谢！！！ –

将CLLocationCoordinate2D坐标转换为CGPoint Swift

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