Rotate Image in ImageView and save to server

Question

how can we rotate a image in image view and apply gesture on image and save that image to server at same state as image is

- (IBAction)imageMove:(id)sender {
    static int numRot = 0;

    myimage.transform = CGAffineTransformMakeRotation(M_PI_2 * numRot);
    ++numRot;
}

from this piece of code i am able to rotate my image view 90 degree

Answer 1

Use This:-

@interface UIImage (RotationMethods)
- (UIImage *)rotateImageByDegree:(CGFloat)degrees;
@end

@implementation UIImage (RotationMethods)

static CGFloat getRadianFromDegree(CGFloat degrees) 

{return degrees * M_PI / 180;};

- (UIImage *) rotateImageByDegree:(CGFloat)degrees 
{   
    UIView *rotatedImageView = [[UIView alloc] initWithFrame:CGRectMake(0,0,self.size.width, self.size.height)];
    CGAffineTransform t = CGAffineTransformMakeRotation(getRadianFromDegree(degrees));
    rotatedImageView.transform = t;
    CGSize rotatedSize = rotatedImageView.frame.size;
    UIGraphicsBeginImageContext(rotatedSize);
    CGContextRef bitmap = UIGraphicsGetCurrentContext();
    CGContextTranslateCTM(bitmap, rotatedSize.width/2, rotatedSize.height/2);
    CGContextRotateCTM(bitmap, getRadianFromDegree(degrees));
    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 *rotatedImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return rotatedImage;

}

@end