iOS PNG Image rotated 90 degrees

Question

In my iOS application I\'m writing, I deal with PNGs because I deal with the alpha channel. For some reason, I can load a PNG into my imageView just fine, but

Answer 1

Here is one more way to achieve that:

@IBAction func rightRotateAction(sender: AnyObject) {

    let imgToRotate = CIImage(CGImage: sourceImageView.image?.CGImage)
    let transform = CGAffineTransformMakeRotation(CGFloat(M_PI_2))
    let rotatedImage = imgToRotate.imageByApplyingTransform(transform)
    let extent = rotatedImage.extent()
    let contex = CIContext(options: [kCIContextUseSoftwareRenderer: false])
    let cgImage = contex.createCGImage(rotatedImage, fromRect: extent)
    adjustedImage = UIImage(CGImage: cgImage)!
    UIView.transitionWithView(sourceImageView, duration: 0.5, options: UIViewAnimationOptions.TransitionCrossDissolve, animations: {
            self.sourceImageView.image = self.adjustedImage
        }, completion: nil)
}