Is it possible to rotate only image in UIImageView? I\'m looking for information about it, but i only found information how rotate UIImageVeiw.
If you need to rotate/flip an image for localization purposes you can use the following:
imageView.image = imageView.image?.imageFlippedForRightToLeftLayoutDirection()
The following code works fine with Swift:
let img = UIImage(CGImage: self.imageView.image!.CGImage, scale: 1.0, orientation: UIImageOrientation.Right)
self.imageView.image = img
self.imageView.setNeedsLayout()
You can rotate the image with the following code. Note, this uses a CGImageRef which you can get from a UIImage via
CGImageRef imageRef = [self CGImageRotatedByAngle:[image CGImage] angle:30];
Once you get the rotated image, you can set the ImageView's image to your new rotated image like this:
UIImage* img = [UIImage imageWithCGImage: imageRef];
myImageView.image = img;
here is a method that will rotate the imageRef:
- (CGImageRef)CGImageRotatedByAngle:(CGImageRef)imgRef angle:(CGFloat)angle
{
CGFloat angleInRadians = angle * (M_PI / 180);
CGFloat width = CGImageGetWidth(imgRef);
CGFloat height = CGImageGetHeight(imgRef);
CGRect imgRect = CGRectMake(0, 0, width, height);
CGAffineTransform transform = CGAffineTransformMakeRotation(angleInRadians);
CGRect rotatedRect = CGRectApplyAffineTransform(imgRect, transform);
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
CGContextRef bmContext = CGBitmapContextCreate(NULL,
rotatedRect.size.width,
rotatedRect.size.height,
8,
0,
colorSpace,
kCGImageAlphaPremultipliedFirst);
CGContextSetAllowsAntialiasing(bmContext, YES);
CGContextSetShouldAntialias(bmContext, YES);
CGContextSetInterpolationQuality(bmContext, kCGInterpolationHigh);
CGColorSpaceRelease(colorSpace);
CGContextTranslateCTM(bmContext,
+(rotatedRect.size.width/2),
+(rotatedRect.size.height/2));
CGContextRotateCTM(bmContext, angleInRadians);
CGContextTranslateCTM(bmContext,
-(rotatedRect.size.width/2),
-(rotatedRect.size.height/2));
CGContextDrawImage(bmContext, CGRectMake(0, 0,
rotatedRect.size.width,
rotatedRect.size.height),
imgRef);
CGImageRef rotatedImage = CGBitmapContextCreateImage(bmContext);
CFRelease(bmContext);
[(id)rotatedImage autorelease];
return rotatedImage;
}
Please try this, it works for me:
[UIView beginAnimations:nil context:nil];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationCurve:UIViewAnimationCurveEaseIn];
[UIView setAnimationRepeatCount:10];
myImgView.transform = CGAffineTransformMakeRotation(M_PI);
[UIView commitAnimations];
Good luck!
Take a look at rotating the ImageView's layer. You will need to import the QuartzCore library to make that accessible.
myImageView.layer.transform = CGAffineTransformMakeRotation (1.5);