Question

我正在继承SKNode并实现touchbegan处理程序。

当用户点击节点时，节点位置会更改，但节点不会在屏幕上移动。

我想我需要以某种方式强制渲染SKScene。

为了测试我对xcode6游戏的模板进行了以下微小更改。这里是对模板的更改：

GameViewControler.swift

 let HUD = SKScene(fileNamed: "HUD.sks") 
 scnView.overlaySKScene = HUD

 var customNode = CustomNode()
 customNode.text = "touch here"
 customNode.position = CGPointMake(200, 200);
 HUD.addChild(customNode)

新类CustomeNode.swift

import Foundation
import SpriteKit

public class CustomNode:SKLabelNode{

public override init() {
    super.init();
    userInteractionEnabled = true;
}

public required init(coder aDecoder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
}

public override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
    position.y = (position.y + 100) % 300 + 100; //does not update on screen
}

}

如果添加回船的动作，则可以：

let ship = scene.rootNode.childNodeWithName("ship", recursively: true)!
    ship.runAction(SCNAction.repeatActionForever(SCNAction.rotateByX(0, y: 2, z: 0, duration: 1)))

如何强制渲染？

更新为了澄清GameViewControler.swift的完整代码，删除了不需要的内容。

import UIKit
import QuartzCore
import SceneKit
import SpriteKit

class GameViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        // create a new scene
        let scene = SCNScene(named: "art.scnassets/ship.dae") //comes with XCode6 Game Project Template.

        // create and add a camera to the scene
        let cameraNode = SCNNode()
        cameraNode.camera = SCNCamera()
        scene?.rootNode.addChildNode(cameraNode)

        // place the camera
        cameraNode.position = SCNVector3(x: 0, y: 0, z: 15)

         // retrieve the SCNView
        let scnView = self.view as SCNView

        // set the scene to the view
        scnView.scene = scene

        // allows the user to manipulate the camera
        scnView.allowsCameraControl = true

        // configure the view
        scnView.backgroundColor = UIColor.blackColor()

        let HUD = SKScene(size: self.view.bounds.size)
        scnView.overlaySKScene = HUD
        scnView.overlaySKScene.userInteractionEnabled = true;

        var customNode = CustomNode()
        customNode.text = "touch here"
        customNode.position = CGPointMake(200, 200);
        HUD.addChild(customNode)

        //let ship = scene.rootNode.childNodeWithName("ship", recursively: true)!
        //ship.runAction(SCNAction.repeatActionForever(SCNAction.rotateByX(0, y: 2, z: 0, duration: 1)))
    }
}

Answer 1

在viewDidLoad底部简单添加：

scnView.play(nil)

Answer 2

[scene.view setNeedsDisplay：YES] 要么 [node.scene.view setNeedsDisplay：YES]

Answer 3

我使用以下方法解决了类似问题：

self.gameView!.playing = true;
self.gameView!.loops = true;

SCNScene - 不对在touchesBegan处理程序上创建的SKNode进行更改

3 个答案: