iOS 在按下时禁用动画

Question

当我按下后退按钮时，动画再次开始并且我松开屏幕上的按钮。

为了更好地理解，这里有一个 gif:

https://i.gyazo.com/9d2ec00152c614c94a2ab2c797e86e12.gif

eoverride func viewDidLoad() {
    super.viewDidLoad()

    std.center.x += view.bounds.width
    prtl.center.x += view.bounds.width
    .
    .

}

override func viewWillAppear(_ animated: Bool)
{
    UIView.animate(withDuration: 0.5, delay: 0.5, options: [], animations: {
        self.std.center.x -= self.view.bounds.width
    }, completion: nil)

    UIView.animate(withDuration: 0.5, delay: 0.6, options: [], animations: {
        self.prtl.center.x -= self.view.bounds.width
    }, completion: nil)
    .
    .
}

如何停止动画重新开始以防止屏幕上的按钮松动。

谢谢!

Answer 1

override func viewDidLoad() {
    super.viewDidLoad()

    std.center.x += view.bounds.width
    prtl.center.x += view.bounds.width
    .
    .
    UIView.animate(withDuration: 0.5, delay: 0.5, options: [], animations: {
        self.std.center.x -= self.view.bounds.width
    }, completion: nil)

    UIView.animate(withDuration: 0.5, delay: 0.6, options: [], animations: {
        self.prtl.center.x -= self.view.bounds.width
    }, completion: nil)
}

从 viewWillAppear 中删除代码并尝试此操作。