[英]How do I calculate the required height of a GridView that is inside of a ScrollView on Android?
[英]How do I capture a zoomed UIImageView inside of a Scrollview to crop in Android?
func getZoomedImage() - > UIImage {
//Calculate the required area from the scrollview
var visibleRect = CGRect()
let scale: CGFloat = CGFloat(1.0 / scrollViewGallery.zoomScale)
visibleRect.origin.x = scrollViewGallery.contentOffset.x * scale
visibleRect.origin.y = scrollViewGallery.contentOffset.y * scale
visibleRect.size.width = scrollViewGallery.bounds.size.width * scale
visibleRect.size.height = scrollViewGallery.bounds.size.height * scale
let cgImg: CGImage? = imgView.image?.cgImage?.cropping(to: visibleRect)
let croppedImg = UIImage(cgImage: cgImg!)
return croppedImg
}
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