Question

所以，我有这段代码：

UIView.animate(withDuration: 10.0, delay: 0, options: .curveLinear , animations: { 
            self.gameLabel.alpha = 0
}, completion: nil)

问题是，当调用此代码时，它立即转到0 alpha并且不会缓慢转换。我做错了什么？

以下是代码的更多上下文：

var gameLabel = SKLabelNode()

override func didMove(to view: SKView) {
    gameLabel.fontColor = UIColor.white
    gameLabel.fontSize = 85
    gameLabel.setScale(0.40)
    gameLabel.text = "this is a game"
    gameLabel.position = CGPoint(x: 0, y: 0)
    gameLabel.zPosition = 0
    gameLabel.alpha = 1

    addChild(gameLabel)   
}

func touchDown(atPoint pos : CGPoint) {
    UIView.animate(withDuration: 2, animations: {
            self.gameLabel.alpha = 0
    })
}

Answer 1

所以，我通过跑步解决了我的问题。

self.gameLabel.run(SKAction.fadeOut(withDuration: 10))

Swift animatewithDuration（）立即完成

1 个答案: