Question

А导致意外的问题：

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播放第一帧1“jaba1”，然后帧0“jaba0”！为什么呢？

谢谢！

Answer 1

我编译了你的代码，它运行得很好。以下是步骤：

在你的GameScene.swift文件中设置jaba播放器如下

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)
    }

之后在GameScene.swift文件中生成enemyThrow（敌人：SKSpriteNode）函数，如下所示

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)

        }

最后，在didMove（toView :)函数中，在self.addchild（jaba）之后调用enemyThrow（enemy :)函数。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)
    }

SKAction.animation - 框架顺序

1 个答案: