UIImageView: get transformed UIImage

Question

I\'m rotating UIImageView using this:

[UIView beginAnimations:nil context:nil];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationCurve:UI         


        

Answer 1

it works for me , and another way to solve

- (UIImage *)imageRotatedByDegrees:(CGFloat)degrees
{
    CGRect imgRect = CGRectMake(0, 0, self.size.width, self.size.height);
    CGAffineTransform transform = CGAffineTransformMakeRotation(DegreesToRadians(degrees));
    CGRect rotatedRect = CGRectApplyAffineTransform(imgRect, transform);
    CGSize rotatedSize = rotatedRect.size;

    // Create the bitmap context
    UIGraphicsBeginImageContext(rotatedRect.size);
    CGContextRef bitmap = UIGraphicsGetCurrentContext();

    // Move the origin to the middle of the image so we will rotate and scale around the center.
    CGContextTranslateCTM(bitmap, rotatedSize.width/2, rotatedSize.height/2);

    // Rotate the image context
    CGContextRotateCTM(bitmap, DegreesToRadians(degrees));

    // Now, draw the rotated/scaled image into the context
    CGContextScaleCTM(bitmap, 1.0, -1.0);
    CGContextDrawImage(bitmap, CGRectMake(-self.size.width / 2, -self.size.height / 2, self.size.width, self.size.height), [self CGImage]);

    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return newImage;
}