Swift iOS SKActions 不适用于从 SKS 文件引入的精灵

Question

我有一个 spriteKit 项目，它通过从 sks 文件加载精灵来将精灵带到场景中。我知道它们加载正确，因为我可以对它们执行其他功能。在模拟器中，他们甚至运行 SKActions，但在实际设备（iPad pro gen 2）上，他们不运行这些动作。我制作了以下测试程序来说明问题。

具体的问题是为什么从 SKS 文件加载的精灵不在真实设备上运行 SKActions？

import SpriteKit
import GameplayKit

class GameScene: SKScene {


private var fileDropSite: SKSpriteNode!

var lessonNode: SKSpriteNode?
var lessonButton: SKSpriteNode?


override func didMove(to view: SKView) {
    fileDropSite = childNode(withName: "fileDropSite") as! SKSpriteNode

}

func bringSKSTOLoad() {
    fileDropSite.removeAllChildren()
    let lessonToLoad = SKSpriteNode(fileNamed: "practiceLesson")?.childNode(withName: "unitNode")
    lessonToLoad?.move(toParent: fileDropSite)

    lessonNode = fileDropSite.childNode(withName: "//lessonNode") as? SKSpriteNode
    lessonButton = fileDropSite.childNode(withName: "//lessonButton") as? SKSpriteNode
    print("lessonLoaded")
}


override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    for touch in touches {
        let touchLocation = touch.location(in: self)
        let touchedNode = atPoint(touchLocation)
        if let nodesName = touchedNode.name {
            if nodesName == "fileDropSite" {
                print("fileDropSite TOuched")
                bringSKSTOLoad()
            }
            if nodesName == "lessonButton" {
                print("lessonButton TOuched")
                lessonNode?.run(SKAction.repeatForever(SKAction.sequence([SKAction.moveBy(x: -100, y: 0, duration: 0.5), SKAction.moveBy(x: 100, y: 0, duration: 0.5)])))
            }
        }
    }
}

澄清一下：fileDropSite 是游戏场景中的子精灵，课程节点和课程按钮是名为 practiceLesson 的文件中的精灵，并且是名为 unitNode 的精灵的子精灵。下面的代码将这些初始化为变量，并在触摸 fileDropSite 精灵时，然后通过 fileDropSite（场景的子节点）将文件中的精灵加载到场景中，并初始化它们。有一个触摸功能会导致课程节点及其子节点在模拟器上来回晃动，但在 rea 设备上不会。

Answer 1

试试……

override func didMove(to view: SKView) {
    fileDropSite = childNode(withName: "fileDropSite") as! SKSpriteNode
    self.isPaused = false
}

从 iOS11 开始，Apple 已将场景和 SKSpriteNodes 的默认状态设为暂停。一般在现场运行self.isPaused = false 对我有用。

如果需要的话……

func bringSKSTOLoad() {
    fileDropSite.removeAllChildren()
    let lessonToLoad = SKSpriteNode(fileNamed: "practiceLesson")?.childNode(withName: "unitNode")
    lessonToLoad?.move(toParent: fileDropSite)

    lessonNode = fileDropSite.childNode(withName: "//lessonNode") as? SKSpriteNode
    lessonButton = fileDropSite.childNode(withName: "//lessonButton") as? SKSpriteNode
    print("lessonLoaded")
    lessonToLoad.isPaused = false
    lessonNode.isPaused = false
    lessonButton.isPaused = false
}