spin image clockwise/anticlockwise on touch

Question

Any idea about how to spin image clockwise/anticlockwise on touch.

Answer 1

You'll want to use CoreAnimation for this; basically you'll need to apply an animation to the transform property of your image view. There are plenty of samples on Apple's developer page that show variations on this.

Answer 2

#import <QuartzCore/QuartzCore.h> 

[UIView beginAnimations:@"RotationAnimation" context:nil];

CABasicAnimation *fullRotationAnimation;
fullRotationAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation"];
fullRotationAnimation .fromValue = [NSNumber numberWithFloat:0];
fullRotationAnimation.toValue = [NSNumber numberWithFloat:((360*M_PI)/180)];
fullRotationAnimation.duration = 2;          // speed for the rotation. Smaller number is faster
fullRotationAnimation.repeatCount = 1e100f;  // number of times to spin. 1 = once
[myImage.layer addAnimation:fullRotationAnimation forKey:@"360"];

[UIView commitAnimations];