crop a specific area of a image in swift

Question

I am creating a app where you can crop multiple images to one specific size.

I have a array with multiple images. The images of the array were displayed on a view, where I can drag them inside the view. I am using the same image twice. It look like this:

I also have a crop view (displays red only for demonstration). The images should be crop to this size of the crop view:

The end result look like this:

There were a few problems. I don't understand why the image is rotated. It also seems the image is not cropped to the crop view that I created (the red view). Also the images should have a slight delay, because I drag each of them to a other place in the view.

The method that I am using is from apples documentation:

let cropRect = CGRect(x: cropView.frame.origin.x, y: cropView.frame.origin.y, width: cropView.frame.width, height: cropView.frame.height)

        let croppedImage = ImageCrophandler.sharedInstance.cropImage(imageContentView[i].image!, toRect: cropRect, viewWidth: cropView.frame.width, viewHeight: cropView.frame.height)

        print(croppedImage)

        arrayOfCropedImages.append(croppedImage!)

    func cropImage(_ inputImage: UIImage, toRect cropRect: CGRect, viewWidth: CGFloat, viewHeight: CGFloat) -> UIImage? {
    let imageViewScale = max(inputImage.size.width / viewWidth,
                             inputImage.size.height / viewHeight)

    // Scale cropRect to handle images larger than shown-on-screen size
    let cropZone = CGRect(x:cropRect.origin.x * imageViewScale,
                          y:cropRect.origin.y * imageViewScale,
                          width:cropRect.size.width * imageViewScale,
                          height:cropRect.size.height * imageViewScale)

    // Perform cropping in Core Graphics
    guard let cutImageRef: CGImage = inputImage.cgImage?.cropping(to:cropZone)
    else {
        return nil
    }

    // Return image to UIImage
    let croppedImage: UIImage = UIImage(cgImage: cutImageRef)


    return croppedImage
}