在GMSMarker背后发送CALayer

Question

谷歌地图中的标记似乎是位于GMSMapView图层上的叠加层。

我有一个额外的图层，我希望它在GMSMarker背后，但无论我做什么，图层都保持在最前面。

///creating the marker 
var locValue:CLLocationCoordinate2D = manager.location!.coordinate 
    var currentLocationMarker = GMSMarker(position: locValue) 
    currentLocationMarker.icon = UIImage(named: "loc_now") 
    currentLocationMarker.map = viewMap //(GMSMapView) 

    ///creating the layer and positioning it 
    var newlayer = CALayer() 
     newlayer.backgroundColor = UIColor.red.cgColor 
     newlayer.frame = CGRect(x: 100, y: 100, width: 100, height: 100) 
     newlayer.position.x = (currentLocationMarker.map?.layer.position.x)! 
     newlayer.position.y = ((currentLocationMarker.map?.layer.position.y)!-20) 
     viewMap.layer.insertSublayer(newlayer, at: 1) //no matter what it always sits on top of the marker 

Answer 1

如何viewMap.layer.insertSublayer(newlayer, at: 0) 可能的工作。我真的不知道迅速，但给它一个