Question

[CATransaction begin];
[CATransaction setValue:(id)kCFBooleanTrue forKey:kCATransactionDisableActions];
CGRect frame = [button frame];
button.layer.anchorPoint = CGPointMake(0.5, 0.5);
button.layer.position = CGPointMake(frame.origin.x + 0.5 * frame.size.width, frame.origin.y + 0.5 * frame.size.height);
[CATransaction commit];

[CATransaction begin];
[CATransaction setValue:(id)kCFBooleanFalse forKey:kCATransactionDisableActions];
[CATransaction setValue:[NSNumber numberWithFloat:2.0] forKey:kCATransactionAnimationDuration];

CABasicAnimation *animation;
animation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
animation.fromValue = [NSNumber numberWithFloat:0.0];
animation.toValue = [NSNumber numberWithFloat:2 * M_PI];
animation.timingFunction = [CAMediaTimingFunction functionWithName: kCAMediaTimingFunctionLinear];
animation.delegate = self;
[button.layer addAnimation:animation forKey:@"rotationAnimation"];

[CATransaction commit];

i tried this code bt not useful i want to move image view in circular path

Answer 1

The animation you wants can be done without Using CAAnimation class.

Use the following code inside a NSTimer object..

Make a loop inside which the angle variable is starting from 0 to infinity or multiple of 360.

//radius is the circle radius in which you want to move the ImageView.

myImageView.center = CGPointMake(myImageView.center.x + cos(angle) * radius, myImageView.center.y + sin (angle) * radius);