Comments on: Rotate an Image with Animation – Part 1

By: Daniel Burke

Daniel Burke — Wed, 18 Apr 2012 05:19:25 +0000

Thanks! used this to spin a little gear and toggle the keyboard :)

By: Mashhadi

Mashhadi — Tue, 28 Feb 2012 06:26:03 +0000

Wow superb thats realy what i want

By: Alan Kernel

Alan Kernel — Mon, 27 Feb 2012 14:10:39 +0000

How do I have a UIImageView move in a straight line while rotating several times before reaching the destination?
Thanks
-Al

By: Simon Hurst

Simon Hurst — Sun, 26 Feb 2012 18:03:45 +0000

change the method to take a UIButton then. If it works. you’re getting a warning because it’s expected a UIImageView.

By: Helmut

Helmut — Wed, 18 Jan 2012 01:58:47 +0000

I’ve tested your code you shared with us. I call it in a function to place the iOS info button.

Im getting a warning for using it on the Botton Image

incomapttible Objective-C type ‘struct UIButton*, expected “struct UImageView”
But it is working fine and changes and rotates the infoButton to any requested rotation.

Any one help out with an explanation why it actually works for this particular implementation:

UIButton *userInfo = [UIButton buttonWithType:UIButtonTypeInfoLight];
userInfo.frame = CGRectMake(278, 10, 16, 36);
userInfo.backgroundColor = [UIColor clearColor];
[userInfo addTarget:self action:@selector(flipToUsersGuide:)
forControlEvents:UIControlEventTouchUpInside];
……..

[self rotateImage:iuserInfo duration:0.0 curve:UIViewAnimationCurveEaseIn degrees:-90];
I am getting Build Warning SDK 4.3 and later
incomapttible Objective-C type ‘struct UIButton*, expected “struct UImageView”

// Note setting animation time to zero no need to actually obserserve the rotation in this implementation
// the current view is set to LanscapeLeft

Calling your method you have shared in this post

———- all is working fine
- (void)rotateImage:(UIImageView *)image duration:(NSTimeInterval)duration
curve:(int)curve degrees:(CGFloat)degrees
{
// Setup the animation
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:duration];
[UIView setAnimationCurve:curve];
[UIView setAnimationBeginsFromCurrentState:YES];

// The transform matrix
CGAffineTransform transform = CGAffineTransformMakeRotation(DEGREES_TO_RADIANS(degrees)) ;
image.transform = transform;

// Commit the changes
[UIView commitAnimations];
}

By: JFA

JFA — Sun, 01 Jan 2012 20:52:14 +0000

Hi !
I’ve tested the code you gave.
I’ve changed the angle of rotation (in radians), and added a function that converts from degrees to radians

If the angle in degrees is 360 everything is ok
but if is for example 90 or any number different than 360
the layer makes the rotation animation and then goes slightly to the start point.

Why it doesn’t remain at that value of rotation ?

Thanks

By: JFA

JFA — Sun, 01 Jan 2012 20:46:24 +0000

you have to change the .anchorPoint PROPERTY
and make it different than the (0.5,0.5) which is the center

By: John Muchow

John Muchow — Tue, 27 Sep 2011 13:41:30 +0000

No, this will not implement 3D image rotation.

By: Matt

Matt — Tue, 27 Sep 2011 09:07:06 +0000

Hello,

will the result of this animation 360 rotate image like this – http://studio.fotorobot.cz/?

Thanks, Matt.

By: the future

the future — Wed, 07 Sep 2011 20:36:03 +0000

Thanks a lot for this post. It was really helpful.

I am actually building a script to rotate an image back and forth about 45 degrees in an NSTimer.

Thanks for the code snippets. :)