SwiftUI 按钮点击重置 SpriteKit 动画 - 这是一个错误吗？

Question

我想在我的 SwiftUI 应用程序中使用动画背景。我通过使用 SpriteKit GameScene 作为我的背景，并使用 SKActions 逐渐淡入和淡出不同的图像来实现这一点。

但是，我注意到当我点击我的 SwiftUI 应用程序中的任何按钮时，它会完全重置动画。

这是一个错误吗？有人知道解决这个问题的方法吗？

这是我的 SwiftUI 的简化版本 ContentView.swift:

struct ContentView: View {
    var scene: SKScene {
        let scene = GameScene()
        scene.size = CGSize(width: 1125, height: 2436)
        scene.scaleMode = .fill
        return scene
    }

    var body: some View {
        SpriteView(scene: scene)
            .frame(width: UIScreen.main.bounds.size.width, height: UIScreen.main.bounds.size.height)
            .ignoresSafeArea()

    }

}

这是我用来设置背景动画的代码：

    // Animations
let fadeOutAnimation: SKAction = SKAction.fadeOut(withDuration: 5)
let fadeInAnimation: SKAction = SKAction.fadeIn(withDuration: 5)
let wait5Animation: SKAction = SKAction.wait(forDuration: 5)
let wait10Animation:SKAction = SKAction.wait(forDuration: 10)
let wait20Animation:SKAction = SKAction.wait(forDuration: 20)

 // Repeating Background Actions
    let firstRepeatingSequence = SKAction.repeatForever(SKAction.sequence([fadeOutAnimation, wait20Animation, fadeInAnimation]))
    let secondRepeatingSequence = SKAction.repeatForever(SKAction.sequence([fadeOutAnimation, wait10Animation, fadeInAnimation, wait10Animation]))
    let thirdRepeatingSequence = SKAction.repeatForever(SKAction.sequence([fadeOutAnimation, fadeInAnimation, wait20Animation]))
    
    //Access bg sprites
    let bg1 = SKSpriteNode(imageNamed: "blue1")
    bg1.anchorPoint = CGPoint(x: 0, y: 0)
    let bg2 = SKSpriteNode(imageNamed: "red1")
    bg2.anchorPoint = CGPoint(x: 0, y: 0)
    let bg3 = SKSpriteNode(imageNamed: "green1")
    bg3.anchorPoint = CGPoint(x: 0, y: 0)

    self.addChild(bg1)
    self.addChild(bg2)
    self.addChild(bg3)
      
    // Run Background forever
    bg3.run(firstRepeatingSequence)
    bg2.run(SKAction.sequence([wait5Animation, secondRepeatingSequence]))
    bg1.run(SKAction.sequence([wait10Animation, thirdRepeatingSequence]))

Answer 1

我相信它正在重绘视图，当它这样做时，它正在重新初始化您的场景。使您的场景成为 @State 变量并在 init 方法中对其进行初始化。

struct ContentView: View {
    @State var scene = GameScene()

    init() {
        scene.size = CGSize(width: 1125, height: 2436)
        scene.scaleMode = .fill
    }

    var body: some View {
        SpriteView(scene: scene)
            .frame(width: UIScreen.main.bounds.size.width, height: UIScreen.main.bounds.size.height)
            .ignoresSafeArea()

    }

}

SwiftUI 按钮点击重置 SpriteKit 动画 - 这是一个错误吗？

SwiftUI button taps reset SpriteKit animations - is this a bug?

sprite-kit

swift

swiftui