SKAction.animation-帧顺序

Question

А引起意外的问题：

let jaba = SKSpriteNode (imageNamed: "jaba0")
let jabaAnimationThrow: SKAction

for i in 0...1 {
        texturesJaba.append(SKTexture(imageNamed: "jaba\(i)"))
    }
    jabaAnimationThrow = SKAction.animate(with: texturesJaba,
                                         timePerFrame: 0.30)
func enemyThrow(enemy: SKSpriteNode) { 
    let enemyRun = (SKAction.repeatForever((SKAction.sequence([SKAction.wait(forDuration: 3, withRange: 2),jabaAnimationThrow]))))
enemy.run(enemyRun)} 
enemyThrow(enemy: jaba)

问题：SCAstion.animation首先播放第1帧“ jaba1”，然后播放第0帧“ jaba0”！ 为什么？

谢谢！

Answer 1

我已经编译了您的代码，并且效果很好。 步骤如下：

1. 在您的GameScene.swift文件中，按照以下步骤设置jaba Player

    override func didMove(to view: SKView) { let jaba = SKSpriteNode (imageNamed: "jaba0") jaba.position = CGPoint(x: 100, y: 200) // set your desired position jaba.setScale(0.2) // whatever scale you might need self.addChild(jaba) } 

2. 之后，如下所示在GameScene.swift文件中使敌人投掷（敌人：SKSpriteNode）函数

    func enemyThrow(enemy: SKSpriteNode) { var texturesJaba = [SKTexture]() let jabaAnimationThrow: SKAction for i in 0...1 { texturesJaba.append(SKTexture(imageNamed: "jaba\\(i)")) } jabaAnimationThrow = SKAction.animate(with: texturesJaba, timePerFrame: 0.30) let enemyRun = (SKAction.repeatForever((SKAction.sequence([SKAction.wait(forDuration: 3, withRange: 2),jabaAnimationThrow])))) enemy.run(enemyRun) } 

3. 最后，在didMove（toView :)函数中，在self.addchild（jaba）之后调用敌人Throw（enemy :)函数。 该代码应如下所示：

     override func didMove(to view: SKView) { let jaba = SKSpriteNode (imageNamed: "jaba0") jaba.position = CGPoint(x: 100, y: 200) // set your desired position jaba.setScale(0.2) // whatever scale you might need self.addChild(jaba) // call the function enemyThrow here enemyThrow(enemy: jaba) }