iOS：如何创建失败登录动画？

我正在尝试创建一个功能，当用户无法在登录视图中插入通行证或电子邮件时，屏幕将抖动，有人可以帮助我吗

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您可以使用此功能摇动任何视图

 public func shakeView() {

    let shake: CAKeyframeAnimation = CAKeyframeAnimation(keyPath: "transform")
    shake.values = [NSValue(caTransform3D: CATransform3DMakeTranslation(-5.0, 0.0, 0.0)), NSValue(caTransform3D: CATransform3DMakeTranslation(5.0, 0.0, 0.0))]
    shake.autoreverses = true
    shake.repeatCount = 2.0
    shake.duration = 0.07

    self.layer.add(shake, forKey:"shake")
}

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要抖动视图，您可以创建扩展或在下面的函数中稍作更改来抖动任何视图。

您可以通过

CABasicAnimation

应用抖动动画

例如：

class ViewController: UIViewController {

    override func viewDidAppear(_ animated: Bool) {
       super.viewDidAppear(animated)
       shakeAnimation()
    }

    func shakeAnimation() {
        let animation = CABasicAnimation(keyPath: "position")
        animation.duration = 0.3
        animation.repeatCount = 10
        animation.autoreverses = true
        animation.fromValue = NSValue(cgPoint: CGPoint(x: self.view.center.x - 10, y:  self.view.center.y))
        animation.toValue = NSValue(cgPoint: CGPoint(x: self.view.center.x + 10, y:  self.view.center.y))
        self.view.layer.add(animation, forKey: "position")
    }
}

结果:

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不久前为它写了一个视图。在interface builder中放置其中的所有内容，将视图链接为IBOutlet并调用：

shakeItView.shake(completion: { _ in })

我的组件的代码：

public final class ShakeItView: UIView {

    public func shake(completion: @escaping (Bool) -> ()) {
        UIView.animate(withDuration: 0.07 - TimeInterval(count) * 0.01, delay: 0.01, options: .curveEaseInOut, animations: { [unowned self] in
            self.transform = CGAffineTransform.init(translationX: CGFloat(10 * self.direction), y: 0)
        }) { [unowned self] _ in
            if self.count >= 4 {
                self.transform = CGAffineTransform.identity
                self.resetValues()
                completion(true)
            } else {
                self.count += 1
                self.direction *= -1
                self.shake(completion: completion)
            }
        }
    }

    private var direction: Int = 1
    private var count: Int = 0

    private func resetValues() {
        direction = 1
        count = 0
    }

}

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添加代码。请添加您的代码，而不是屏幕截图，而是通过粘贴到您的问题中。