swift UIGraphicsGetImageFromCurrentImageContext can't release memory

Question

Swift Code

When we get a screenshot of a UIView, we use this code usually:

UIGraphicsBeginImageContextWithOptions(frame.size, false, scale)
drawViewHie         


        

Answer 1

I solved this problem by putting image operations in another queue!

private func processImage(image: UIImage, size: CGSize, completion: (image: UIImage) -> Void) {
    dispatch_async(dispatch_get_global_queue(Int(QOS_CLASS_USER_INITIATED.rawValue), 0)) {
        UIGraphicsBeginImageContextWithOptions(size, true, 0)
        image.drawInRect(CGRect(origin: CGPoint.zero, size: size))
        let tempImage = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()

        completion(image: tempImage)
    }
}