Question

我创建了一个名为ButtonJitter的类。

class ButtonJitter: UIButton
{

    func jitter()
    {
        let animation = CABasicAnimation(keyPath: "position")
        animation.duration = 0.05
        animation.repeatCount = 6
        animation.autoreverses = true
        animation.fromValue = NSValue(cgPoint: CGPoint.init(x: self.center.x - 7.0, y: self.center.y))
        animation.toValue = NSValue(cgPoint: CGPoint.init(x: self.center.x, y: self.center.y))
        layer.add(animation, forKey: "position")
    }

    func jitterLong()
    {
        let animation = CABasicAnimation(keyPath: "position")
        animation.duration = 0.05
        animation.repeatCount = 10
        animation.autoreverses = true
        animation.fromValue = NSValue(cgPoint: CGPoint.init(x: self.center.x - 10.0, y: self.center.y))
        animation.toValue = NSValue(cgPoint: CGPoint.init(x: self.center.x, y: self.center.y))
        layer.add(animation, forKey: "position")
    }

}

现在，当用户点击collectionview单元格内的按钮时，我想调用其中一个函数。我已将按钮的类设置为ButtonJitter。我也为该按钮创建了一个动作。但我无法在该行动中调用任何这些功能。

@IBAction func soundBtnPressed(_ sender: UIButton) {
        if let url = Bundle.main.url(forResource: soundArrayPets[sender.tag], withExtension: "mp3")
        {
            player.removeAllItems()
            player.insert(AVPlayerItem(url: url), after: nil)
            player.play()
        }
    }

所以我的问题是我如何访问我的动画功能，所以当用户点击我的集合视图中的按钮时，它会动画？或者我应该在我的cellForItem atIndexPath方法中调用它们？感谢

Answer 1

如果我是你，我只需使用一个guard let语句来检查我的发送者是否属于ButttonJitter类，并让编译器认为是这样。像这样：

@IBAction func soundBtnPressed(_ sender: UIButton) {
    guard let jitterButton = sender as? ButtonJitter else {
        return
    }
    // Now, if the sender is a button of class ButtonJitter, you have a button that is of that class: jitterButton. Do whatever you want with it. Like call jitterButton.jitter()
    if let url = Bundle.main.url(forResource: soundArrayPets[sender.tag], withExtension: "mp3")
    {
        player.removeAllItems()
        player.insert(AVPlayerItem(url: url), after: nil)
        player.play()
    }
}

将动画添加到集合视图单元格内的按钮

1 个答案: