如何为 UITableViewCell 实现抖动动画答案

【问题标题】：How to implement a shake animation to a UITableViewCell如何为 UITableViewCell 实现抖动动画
【发布时间】：2014-01-09 15:22:03
【问题描述】：

如何让 UITableViewCell 从左侧晃动到右侧？

我想让用户知道“这个操作是不可能的”！

【问题讨论】：

标签： ios animation uitableview caanimation shake

【解决方案1】：

这是我的解决方案：

    CGPoint position = cell.center;

    UIBezierPath *path = [UIBezierPath bezierPath];
    [path moveToPoint:CGPointMake(position.x, position.y)];
    [path addLineToPoint:CGPointMake(position.x-20, position.y)];
    [path addLineToPoint:CGPointMake(position.x+20, position.y)];
    [path addLineToPoint:CGPointMake(position.x-20, position.y)];
    [path addLineToPoint:CGPointMake(position.x+20, position.y)];
    [path addLineToPoint:CGPointMake(position.x, position.y)];

    CAKeyframeAnimation *positionAnimation = [CAKeyframeAnimation animationWithKeyPath:@"position"];
    positionAnimation.path = path.CGPath;
    positionAnimation.duration = .5f;
    positionAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];

    [CATransaction begin];
    [cell.layer addAnimation:positionAnimation forKey:nil];
    [CATransaction commit];

玩得开心！

【讨论】：

【解决方案2】：

谢谢汉斯一号！这里是 Swift 和 UITableViewCell 的扩展形式，可以选择持续时间和路径长度。

import UIKit
import QuartzCore

extension UITableViewCell {
    func shake(duration: CFTimeInterval = 0.3, pathLength: CGFloat = 15) {
        let position: CGPoint = self.center

        let path: UIBezierPath = UIBezierPath()
        path.moveToPoint(CGPointMake(position.x, position.y))
        path.addLineToPoint(CGPointMake(position.x-pathLength, position.y))
        path.addLineToPoint(CGPointMake(position.x+pathLength, position.y))
        path.addLineToPoint(CGPointMake(position.x-pathLength, position.y))
        path.addLineToPoint(CGPointMake(position.x+pathLength, position.y))
        path.addLineToPoint(CGPointMake(position.x, position.y))

        let positionAnimation = CAKeyframeAnimation(keyPath: "position")

        positionAnimation.path = path.CGPath
        positionAnimation.duration = duration
        positionAnimation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionLinear)

        CATransaction.begin()
        self.layer.addAnimation(positionAnimation, forKey: nil)
        CATransaction.commit()
    }
}

【讨论】：

【解决方案3】：

这是 oyalhi 协议的 Swift 4 版本：

import UIKit

extension UITableViewCell {
    func shake(duration: CFTimeInterval = 0.3, pathLength: CGFloat = 15) {
        let position: CGPoint = self.center

        let path: UIBezierPath = UIBezierPath()
        path.move(to: CGPoint(x: position.x, y: position.y))
        path.addLine(to: CGPoint(x: position.x-pathLength, y: position.y))
        path.addLine(to: CGPoint(x: position.x+pathLength, y: position.y))
        path.addLine(to: CGPoint(x: position.x-pathLength, y: position.y))
        path.addLine(to: CGPoint(x: position.x+pathLength, y: position.y))
        path.addLine(to: CGPoint(x: position.x, y: position.y))

        let positionAnimation = CAKeyframeAnimation(keyPath: "position")

        positionAnimation.path = path.cgPath
        positionAnimation.duration = duration
        positionAnimation.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.linear)

        CATransaction.begin()
        self.layer.add(positionAnimation, forKey: nil)
        CATransaction.commit()
    }
}

【讨论】：

【解决方案4】：

我根据@oyalhi 的回答用 Swift 4 创建了一个协议：

protocol Shackable { }

extension Shackable where Self: UIView {

    func shake(duration: CFTimeInterval = 0.3, pathLength: CGFloat = 15) {
        let position = self.center
        let path = UIBezierPath()

        path.move(to: CGPoint(x: position.x, y: position.y))
        path.addLine(to: CGPoint(x: position.x - pathLength, y: position.y))
        path.addLine(to: CGPoint(x: position.x + pathLength, y: position.y))
        path.addLine(to: CGPoint(x: position.x - pathLength, y: position.y))
        path.addLine(to: CGPoint(x: position.x + pathLength, y: position.y))
        path.addLine(to: CGPoint(x: position.x, y: position.y))

        let positionAnimation = CAKeyframeAnimation(keyPath: "position")
        positionAnimation.path = path.cgPath
        positionAnimation.duration = duration
        positionAnimation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionLinear)
        CATransaction.begin()
        self.layer.add(positionAnimation, forKey: nil)
        CATransaction.commit()
    }
}

【讨论】：