ios - UIView帧动画 "wiggle"

Question

我有这段疯狂的代码。我如何使用 Core Animation 为它制作动画，这样我的代码就更少了？我找到了 some code制作“摆动”动画，但那是 3D 形式，我只想让 View 左右移动，我不想让它在两侧弹跳。

[UIView animateWithDuration:0.1f
                 animations:^{
                     CGRect frame = tableView.frame;
                     frame.origin.x -= 4;
                     tableView.frame = frame;
               } completion:^(BOOL finished) {
                   [UIView animateWithDuration:0.1f
                                    animations:^{
                                        CGRect frame = tableView.frame;
                                        frame.origin.x += 4;
                                        tableView.frame = frame;
                                  } completion:^(BOOL finished) {
                                        [UIView animateWithDuration:0.1f
                                                         animations:^{
                                                             CGRect frame = tableView.frame;
                                                             frame.origin.x -= 4;
                                                             tableView.frame = frame;
                                                       } completion:^(BOOL finished) {
                                                             [UIView animateWithDuration:0.1f
                                                                              animations:^{
                                                                                  CGRect frame = tableView.frame;
                                                                                  frame.origin.x = 0;
                                                                                  tableView.frame = frame;
                                                                            } completion:^(BOOL finished) {
                                                                                  // Nothing
                                                                            }
                                                              ];
                                                       }
                                        ];
                                  }
                    ];
               }
];

Answer 1

我想跟进这个问题，以防有人无意中发现它。我现在正在使用关键帧:

-(void)wiggleView {
    CAKeyframeAnimation *animation = [CAKeyframeAnimation animation];
    animation.keyPath = @"position.x";
    animation.values = @[ @0, @8, @-8, @4, @0 ];
    animation.keyTimes = @[ @0, @(1 / 6.0), @(3 / 6.0), @(5 / 6.0), @1 ];
    animation.duration = 0.4;
    animation.additive = YES;
    [self.layer addAnimation:animation forKey:@"wiggle"];
}