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-effect/.

However, by trying to adapt the following code to shake a UIView, it does not work:

- (void)animate {
    const int numberOfShakes = 8;
    const float durationOfShake = 0.5f;
    const float vigourOfShake = 0.1f;

    CAKeyframeAnimation *shakeAnimation = [CAKeyframeAnimation animation];

    CGRect frame = lockView.frame;

    CGMutablePathRef shakePath = CGPathCreateMutable();
    CGPathMoveToPoint(shakePath, NULL, CGRectGetMinX(frame), CGRectGetMinY(frame));

    for (int index = 0; index < numberOfShakes; ++index) {
        CGPathAddLineToPoint(shakePath, NULL, CGRectGetMinX(frame) - frame.size.width * vigourOfShake, CGRectGetMinY(frame));

        CGPathAddLineToPoint(shakePath, NULL, CGRectGetMinX(frame) + frame.size.width * vigourOfShake, CGRectGetMinY(frame));
    }

    CGPathCloseSubpath(shakePath);

    shakeAnimation.path = shakePath;
    shakeAnimation.duration = durationOfShake;


    [lockView.layer addAnimation:shakeAnimation forKey:@"frameOrigin"];

}

Answer 1

I prefer this solution that has a nice springy behavior, ideal for a wrong-password shake animation.

view.transform = CGAffineTransformMakeTranslation(20, 0);
[UIView animateWithDuration:0.4 delay:0.0 usingSpringWithDamping:0.2 initialSpringVelocity:1.0 options:UIViewAnimationOptionCurveEaseInOut animations:^{
    view.transform = CGAffineTransformIdentity;
} completion:nil];

Swift 3

extension UIView {
    func shake() {
        self.transform = CGAffineTransform(translationX: 20, y: 0)
        UIView.animate(withDuration: 0.4, delay: 0, usingSpringWithDamping: 0.2, initialSpringVelocity: 1, options: .curveEaseInOut, animations: {
            self.transform = CGAffineTransform.identity
        }, completion: nil)
    }
}

Answer 2

I wrote that post. It's overkill for a UIView, plus the parameters are geared toward an OSX app. Do this instead.

CABasicAnimation *animation = 
                         [CABasicAnimation animationWithKeyPath:@"position"];
[animation setDuration:0.05];
[animation setRepeatCount:8];
[animation setAutoreverses:YES];
[animation setFromValue:[NSValue valueWithCGPoint:
               CGPointMake([lockView center].x - 20.0f, [lockView center].y)]];
[animation setToValue:[NSValue valueWithCGPoint:
               CGPointMake([lockView center].x + 20.0f, [lockView center].y)]];
[[lockView layer] addAnimation:animation forKey:@"position"];

You'll have to play with the duration and repeatCount parameters as well as the x distance from center in the from and to values, but it should give you what you need. I hope that helps. Let me know if you have any questions.

---

---

Swift 3.0

let midX = lockView.center.x
let midY = lockView.center.y

let animation = CABasicAnimation(keyPath: "position")
animation.duration = 0.06
animation.repeatCount = 4
animation.autoreverses = true
animation.fromValue = CGPoint(x: midX - 10, y: midY)
animation.toValue = CGPoint(x: midX + 10, y: midY)
layer.add(animation, forKey: "position")

Answer 3

Here's my nice and simple looking version This simulates the shake you get on Mac OS X when you do an incorrect login. You could add this as a category on UIView if you like.

@implementation UIView (DUExtensions)

- (void) shake {
    CAKeyframeAnimation *animation = [CAKeyframeAnimation animationWithKeyPath:@"transform.translation.x"];
    animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
    animation.duration = 0.6;
    animation.values = @[ @(-20), @(20), @(-20), @(20), @(-10), @(10), @(-5), @(5), @(0) ];
    [self.layer addAnimation:animation forKey:@"shake"];  
}

@end

The animation values are the x offset from the views current position. Positive values shifting the view to the right, and negative values to the left. By successively lowering them, you get a shake that naturally loses momentum. You can tweak these numbers if you like.

Answer 4

Here is the swift version as an extension in case anybody needs it

extension UIImageView{
    func vibrate(){
        let animation = CABasicAnimation(keyPath: "position")
        animation.duration = 0.05
        animation.repeatCount = 5
        animation.autoreverses = true
        animation.fromValue = NSValue(CGPoint: CGPointMake(self.center.x - 2.0, self.center.y))
        animation.toValue = NSValue(CGPoint: CGPointMake(self.center.x + 2.0, self.center.y))
        self.layer.addAnimation(animation, forKey: "position")
    }
}

This will animate an small UIImageView (around 15x15). If you need to animate something bigger you may want to change the 2.0 factor of movement to something greater.