Update Label In While Loop Swift

Question

Correct me if I\'m wrong, but when I try to update my label in a while loop it won\'t update it. Is the reason that the while loop runs too quickly for the label to update w

Answer 1

Try Below Code, this will surely works.

 while (currentSize < fileSize) {

        dispatch_sync(dispatch_get_main_queue(), { () -> Void in
            downloadLabel.attributedText = NSAttributedString(string: "\(currentSize) kbps", attributes: [NSFontAttributeName: UIFont(name: "Arial", size: 20)!, NSForegroundColorAttributeName: UIColor.darkTextColor()])
            });

    }

Just paste your UI update code to main thread as shown above. Reason : You can't update your UI from background thread.