Rotating UIButton

Question

I've been trying to rotate a button using the following method:

-(IBAction)rotate:(id)sender{
    CGPoint pencilCenter = pencil.center;
    [pencil setCenter:pencilCenter];
    CGFloat floater = 1.0;
    [UIView animateWithDuration:0.7 animations:^(void){
        [pencil setTransform:CGAffineTransformMakeRotation(floater)];
    }];
    [UIView animateWithDuration:0.7 animations:^(void){
        [pencil setTransform:CGAffineTransformMakeRotation(floater)];
    }];
}

This is supposed to make the button do some kind of "shake", then it's supposed to be back in its original position- yet all it does is changing the button's location, moving it to only one side and on another run of the method the button doesn't react at all.

What's the problem with my code?

Thanks!

EDIT 2: My que is- how do I make a button to do a little shake/wiggle ,e.g. the wiggle app mode when editing sptingboard.

Using this code is giving me rotation to left, smooth animates from left to right then right to left, then rotates to original position. Now, I want this not to just rotate, but do this with an animation, like a wiggle.

[UIView animateWithDuration:0.25
                      delay:0.0
                    options:(UIViewAnimationOptionAllowUserInteraction | UIViewAnimationCurveLinear | UIViewAnimationOptionAutoreverse)
                 animations:^ {
                     pencil.transform = CGAffineTransformMakeRotation(DEGREES_TO_RADIANS(30));
                     pencil.transform = CGAffineTransformIdentity;
                 }
                 completion:^(BOOL finished){
                 }
 ];

Thanks!

Answer 1

Import "QuartzCore/QuartzCore.h" and try this,

CABasicAnimation *fullRotation;
fullRotation = [CABasicAnimation animationWithKeyPath:@"transform.rotation"];
fullRotation.delegate = self;
fullRotation.fromValue = [NSNumber numberWithFloat:0];
fullRotation.toValue = [NSNumber numberWithFloat:((360*M_PI)/180)];
fullRotation.duration = 1.7;
fullRotation.repeatCount = 2;
[btnTemp.layer addAnimation:fullRotation forKey:@"360"];

Answer 2

Try using CGAffineTransformRotate instead of CGAffineTransformMakeRotation. You can use `CGAffineTransformIdentity1 as the first argument in all calls, so the final transform according to second argument will be applied on the original shape(?) of the frame.