I hate to say that I'm the new guy to iOS development but the shoe fits... My app needs to either load an image/capture one from camera (which it does) but then needs to crop in LANDSCAPE.
I now have an extension that takes the image and shrinks it down to a landscape image (looks good if the camera is taken from landscape position OR scrunches it to a landscape if taken in portrait). It places it in my "viewfinder" as a tiny landscape image (seen below) and I can swipe outward to make it the size of the "view finder" but that's not what I need.
(the "viewfinder" I had to draw because I didn't put borders on it but you can see the thumbnail in the top left)
func imagePickerController(_ picker: UIImagePickerController,
didFinishPickingMediaWithInfo info: [String : Any]) {
setImageToCrop(image: info[UIImagePickerControllerOriginalImage] as!
UIImage)
picker.dismiss(animated: true, completion: nil)
}
// -------------
func setImageToCrop(image:UIImage){
imageView.image = image
imageViewWidth.constant = image.size.width
imageViewHeight.constant = image.size.height
let scaleHeight = scrollView.frame.size.width/image.size.width
let scaleWidth = scrollView.frame.size.height/image.size.height
scrollView.minimumZoomScale = max(scaleWidth, scaleHeight)
scrollView.zoomScale = max(scaleWidth, scaleHeight)
self.cropButton.isHidden = false
}
// ------------------
@IBAction func cropButtonPressed(_ sender: Any) {
let scale:CGFloat = 1/scrollView.zoomScale
let x:CGFloat = scrollView.contentOffset.x * scale
let y:CGFloat = scrollView.contentOffset.y * scale
let width:CGFloat = scrollView.frame.size.width * scale
let height:CGFloat = scrollView.frame.size.height * scale
let croppedCGImage = imageView.image?.cgImage?.cropping(to: CGRect(x: x, y: y, width: width, height: height))
let croppedImage = UIImage(cgImage: croppedCGImage!)
// "now you can use croppedImage as you like...."
setImageToCrop(image: croppedImage)
}
// ---------------
And then the extension that shrinks the image...
public extension UIImage {
/// Extension to fix orientation of an UIImage without EXIF
func fixOrientation() -> UIImage {
guard let cgImage = cgImage else { return self }
if imageOrientation == .up { return self }
var transform = CGAffineTransform.identity
switch imageOrientation {
case .down, .downMirrored:
transform = transform.translatedBy(x: size.width, y: size.height)
transform = transform.rotated(by: CGFloat(M_PI))
case .left, .leftMirrored:
transform = transform.translatedBy(x: size.width, y: 0)
transform = transform.rotated(by: CGFloat(M_PI_2))
case .right, .rightMirrored:
transform = transform.translatedBy(x: 0, y: size.height)
transform = transform.rotated(by: CGFloat(-M_PI_2))
case .up, .upMirrored:
break
}
switch imageOrientation {
case .upMirrored, .downMirrored:
transform.translatedBy(x: size.width, y: 0)
transform.scaledBy(x: -1, y: 1)
case .leftMirrored, .rightMirrored:
transform.translatedBy(x: size.height, y: 0)
transform.scaledBy(x: -1, y: 1)
case .up, .down, .left, .right:
break
}
if let ctx = CGContext(data: nil, width: Int(size.width), height: Int(size.height), bitsPerComponent: cgImage.bitsPerComponent, bytesPerRow: 0, space: cgImage.colorSpace!, bitmapInfo: CGImageAlphaInfo.premultipliedLast.rawValue) {
ctx.concatenate(transform)
switch imageOrientation {
case .left, .leftMirrored, .right, .rightMirrored:
ctx.draw(cgImage, in: CGRect(x: 0, y: 0, width: size.height, height: size.width))
default:
ctx.draw(cgImage, in: CGRect(x: 0, y: 0, width: size.width, height: size.height))
}
if let finalImage = ctx.makeImage() {
return (UIImage(cgImage: finalImage))
}
}
// something failed -- return original
return self
}
}
I have been around and around with different answers in StackOverFlow but haven't found the solution I'm looking for. I first found an extension that was the "fix all holy grail" but it did nothing. (The app still crops the image but stil rotates when it's saved.)
I'm 100% sure it's something stupid/small that I'm missing but I'm now lost in my code and if it means anything, I've been chasing this issue for WEEKS, if not MONTHS, now. I didn't want to ask unless I absolutely had to. Is there a better way to get an image and crop it it landscape without having it rotate? or is there a fix to this code?
