Getting a screenshot of a UIScrollView, including offscreen parts

by

Here is code that works …

- (IBAction) renderScrollViewToImage
{
    UIImage* image = nil;

    UIGraphicsBeginImageContext(_scrollView.contentSize);
    {
        CGPoint savedContentOffset = _scrollView.contentOffset;
        CGRect savedFrame = _scrollView.frame;

        _scrollView.contentOffset = CGPointZero;
        _scrollView.frame = CGRectMake(0, 0, _scrollView.contentSize.width, _scrollView.contentSize.height);

        [_scrollView.layer renderInContext: UIGraphicsGetCurrentContext()];     
        image = UIGraphicsGetImageFromCurrentImageContext();

        _scrollView.contentOffset = savedContentOffset;
        _scrollView.frame = savedFrame;
    }
    UIGraphicsEndImageContext();

    if (image != nil) {
        [UIImagePNGRepresentation(image) writeToFile: @"/tmp/test.png" atomically: YES];
        system("open /tmp/test.png");
    }
}

The last few lines simply write the image to /tmp/test.png and then opens it in Preview.app. This obviously only works on in the Simulator 🙂

Complete project in the ScrollViewScreenShot Github Repository

More Related Contents:

  1. How I can achieve this design using UITableView [closed]
  2. Populating information in swift 3 for iPad
  3. tableview with automatic row size based on content [closed]
  4. Proper way to exit iPhone application?
  5. How to get device make and model on iOS?
  6. How do I URL encode a string
  7. Converting Storyboard from iPhone to iPad
  8. Remove or uninstall library previously added : cocoapods
  9. How do I make UILabel display outlined text?
  10. Resize UIImage with aspect ratio?
  11. Detect current device with UI_USER_INTERFACE_IDIOM() in Swift
  12. Setting an image for a UIButton in code
  13. UIScrollView not scrolling
  14. UIButton Image + Text IOS
  15. Is there a way to make drawRect work right NOW?
  16. iOS: Keep an app running like a service
  17. How can I click a button behind a transparent UIView?
  18. UIGestureRecognizer and UITableViewCell issue
  19. Differences between UDID and UUID [duplicate]
  20. Tap pressure strength detection using accelerometer
  21. Grid view in iOS [closed]
  22. Detect iOS device type
  23. Converting iPhone xib to iPad xib?
  24. Make app appear as iOS 8 Suggested App at lockscreen
  25. Why Safari shows “No Inspectable Applications” during remote debugging with iOS 6 device?
  26. Swift – Downloading video with downloadTaskWithURL
  27. How to detect that the app is running on a jailbroken device? [duplicate]
  28. Existing iOS form framework
  29. Switch universal app to iPhone only app
  30. Barcode Generation from within iOS App

Leave a Comment