如何始终在顶部获取Google Map的“ myLocationEnabled”蓝点

Question

这是GMSMapView内部的UIImageView的示例。我的问题是Google的蓝点显示在UIImageView的后面...我如何才能使该蓝点myLocationEnabled始终显示在顶部？

@IBOutlet weak var mapView: GMSMapView!

func locationManager(manager: CLLocationManager!, didChangeAuthorizationStatus status: CLAuthorizationStatus){

    NSLog("Did Change Authorization Status")
    if status == CLAuthorizationStatus.AuthorizedWhenInUse {

        //This uses the location manager
        if locationManager.location != nil {
            currentLatitude = locationManager.location.coordinate.latitude
            currentLongitude = locationManager.location.coordinate.longitude
        }
        //How do I get this over my UIImageView?
        mapView.myLocationEnabled = true

        var TARGET: CLLocationCoordinate2D = CLLocationCoordinate2D(latitude: currentLatitude, longitude: currentLongitude)
        var camera: GMSCameraPosition = GMSCameraPosition(target: TARGET, zoom: 12, bearing: 0, viewingAngle: 0)
        mapView.camera = camera        
    }
}

所有这些红色圆圈都是一个UIImageView，位于MapView内部。我希望当前位置在此UIImageView之上...但是使用mapView.myLocationEnabled = true的只是布尔属性，而不是视图或标记...或其他任何东西。.我是否想做些什么？任何帮助都会很棒...谢谢。