UIView shake animation

Question

i\'m trying to make a UIView shake when a button is pressed.

I am adapting the code I found on http://www.cimgf.com/2008/02/27/core-animation-tutorial-window-shake-e

Answer 1

Here is a version using,

+ (void)animateKeyframesWithDuration:(NSTimeInterval)duration delay:(NSTimeInterval)delay options:(UIViewKeyframeAnimationOptions)options animations:(void (^)(void))animations completion:(void (^)(BOOL finished))completion

Introduced in iOS 7.

    const CGFloat xDelta = 16.0f;

    [UIView animateKeyframesWithDuration:0.50f
                                   delay:0.0f
                                 options:UIViewKeyframeAnimationOptionCalculationModeLinear
                              animations:^{

                                  [UIView addKeyframeWithRelativeStartTime:0.0
                                                          relativeDuration:(1.0/6.0)
                                                                animations:^{
                                                                    self.passwordTextField.transform = self.usernameTextField.transform = CGAffineTransformMakeTranslation(xDelta, 0.0);
                                                                }];

                                  [UIView addKeyframeWithRelativeStartTime:(1.0/6.0)
                                                          relativeDuration:(1.0/6.0)
                                                                animations:^{
                                                                    self.passwordTextField.transform = self.usernameTextField.transform = CGAffineTransformMakeTranslation(-xDelta, 0.0);
                                                                }];

                                  [UIView addKeyframeWithRelativeStartTime:(1.0/3.0)
                                                          relativeDuration:(1.0/3.0)
                                                                animations:^{
                                                                    self.passwordTextField.transform = self.usernameTextField.transform = CGAffineTransformMakeTranslation(xDelta/2.0, 0.0);
                                                                }];

                                  [UIView addKeyframeWithRelativeStartTime:(2.0/3.0)
                                                          relativeDuration:(1.0/3.0)
                                                                animations:^{
                                                                    self.passwordTextField.transform = self.usernameTextField.transform = CGAffineTransformIdentity;
                                                                }];

                              }
                              completion:NULL];