添加 SceneKit 约束时应用程序崩溃

Question

I tried to add the constraints for label and add it into the view.

View is added into the node getting crash.

func createNode() {
    let node = SCNNode(geometry: SCNPlane(width: 0.5, height: 0.8)) 
    let view = UIView(frame: CGRect (x: 0, y: 0, width: 200, height: 200))
    view.backgroundColor = UIColor.green
    let label = UILabel()
    label.text = "Hello"
    view.addSubview(label)

    label.topAnchor.constraint(equalTo: view.topAnchor, 
                              constant: 18).isActive = true
    label.leadingAnchor.constraint(equalTo: view.leadingAnchor, 
                                 constant: 20).isActive = true
    label.widthAnchor.constraint(equalToConstant:100).isActive = true
    label.heightAnchor.constroint(equalToConstant: 100).isActive = true

    node.geometry.firstMaterial.diffuse.contents = view
    node.position = SCNVector3(0, 0,-1)  
    scienview.scene.rootNode.addchildNode(node)
}

Anyone help me. . Added inside of main thread also but not working.

Answer 1

This post (see answer) for basic game layout example: 58103566

As mentioned by Larme and you, set your alignment and constraints in viewDidLoad() of GameViewController: UIViewController

For most games, there is some kind of state that the game is in and I have a separate class for it.
GameNodes {}

• InitializeLevel - create nodes, etc. If you start timers, make sure they are in the main thread.
• Start - game logic
• End - game logic
• Cleanup - remove nodes and graphics

I use delegates to communicate between VC's. If the UI needs to be updated, then something like: GameViewController

func showGameStatus(vText: String)
    {
        DispatchQueue.main.async {
            if(vText != "")
            {
                self.lblGameStatus.text = vText
                self.lblGameStatus.isHidden = false
                
            }
            else
            {
                self.lblGameStatus.isHidden = true
            }
        }
    }