'How do you make images wobble like on the iPhone home screen?

I have many icons in my app and I would like to animate them in a manner similar to what happens when you try to delete applications from the iPhone's home screen. How can you do this?

Additionally, is there a way to have the icons animate up onto the screen in a manner similar to what happens when you unlock the iPhone?

iphoneobjective-cioscore-animation


Solution 1:[1]

with blocks (iOS 4+) it would look like:

#define RADIANS(degrees) ((degrees * M_PI) / 180.0)

    CGAffineTransform leftWobble = CGAffineTransformRotate(CGAffineTransformIdentity, RADIANS(-2.0));
    CGAffineTransform rightWobble = CGAffineTransformRotate(CGAffineTransformIdentity, RADIANS(2.0));

    cell.transform = leftWobble;  // starting point
    cell.deleteButton.hidden = NO;

    [UIView animateWithDuration:0.125 delay:0 options:(UIViewAnimationOptionRepeat | UIViewAnimationOptionAutoreverse) animations:^{
        cell.transform = rightWobble;
    }completion:^(BOOL finished){
    }];

Solution 2:[2]

If you mean icons in the main screen of iOS, I don't think it would be ever possible.

Of course, if you mean icons inside your application, you can do whatever you want.

Solution 3:[3]

Answers seem a little outdated, so here's updated logic within an easy to use UIView extension.

Default value for duration parameter being that the animation happens for infinity.

Swift 5 -2022

extension UIView {
    func wobble(duration: CFTimeInterval = .infinity) {
        let animation = CAKeyframeAnimation(keyPath: "transform.rotation.z")
        animation.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.linear)
        animation.duration = 0.2
        animation.values = [0.015, 0.03, 0.015, 0, -0.015, -0.03, -0.015, 0]
        animation.repeatDuration = duration
        layer.add(animation, forKey: "wobble")
    }

    func layerremoveAllAnimations() {
        layer.removeAllAnimations()
    }
}

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 FreaknBigPanda
Solution 2 MHC
Solution 3 Joshua Hart

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