How to rotate UIImage

Question

I\'m developing an iOS app for iPad. Is there any way to rotate a UIImage 90º and then add it to a UIImageView? I\'ve tried a lot of different codes but none worked...

Answer 1

Thanks Jason Crocker this solved my problem. Only one minor correction, interchange height and width in both locations and no distortion occurs, ie,

UIGraphicsBeginImageContext(CGSizeMake(size.width, size.height));
[[UIImage imageWithCGImage:[sourceImage CGImage] scale:1.0 orientation:clockwise ? UIImageOrientationRight : UIImageOrientationLeft]  drawInRect:CGRectMake(0,0,size.width,size.height)]; 

My problem could not be solved by CGContextRotateCTM, I don't know why. My issue is that I'm transmitting my image to a server and it was alway displayed off by 90 degrees. You can easily test if your images are going to work in the non apple world by copying the image to an MS Office Program that you are running on your mac.