Ios Swift谷歌地图-点击标记时如何移动屏幕底部的标记？

我正在玩谷歌地图，我需要覆盖点击标记的默认行为——默认情况下，标记会出现在屏幕中央，信息窗口如上图所示。我需要找出一种方法，当标记被点击时，标记移动到屏幕底部，信息窗口显示在中间。我找到了解决办法，但我无法将其转化为swift

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有什么帮助吗？

添加

GMSMapViewDelegate

func mapView(mapView: GMSMapView!, didTapMarker marker: GMSMarker!) -> Bool {

    mapView.animateToLocation(marker.position)
    mapView.selectedMarker = marker

    var point = mapView.projection.pointForCoordinate(marker.position)
    point.y = point.y - 200

    var newPoint = mapView.projection.coordinateForPoint(point)
    var camera = GMSCameraUpdate.setTarget(newPoint)
    mapView.animateWithCameraUpdate(camera)

    return true

}

 // move marker


   func updateLocationoordinates(coordinates:CLLocationCoordinate2D) {
        if marker == nil
        {
            marker = GMSMarker()
            marker.position = coordinates
            let image = UIImage(named:"destinationmarker")
            marker.icon = image
            marker.map = mapPageView
            marker.appearAnimation = GMSMarkerAnimation.pop
        }
        else
        {
            CATransaction.begin()
//            CATransaction.setAnimationDuration(0.1)
            marker.position =  coordinates
            CATransaction.commit()
        }
        print(coordinates)
    }

摄影机更改位置此方法每次都将调用

func mapView(_ mapView: GMSMapView, didChange position: GMSCameraPosition) {

    var destinationLocation = CLLocation()
    destinationLocation = CLLocation(latitude: position.target.latitude,  longitude: position.target.longitude)
    destinationCoordinate = destinationLocation.coordinate
    updateLocationoordinates(coordinates: destinationCoordinate)

}

祝你好运