Keep transparency in screenshot iOS

Question

I am taking screenshot of a particular View in my Xib file with the following code...

UIView* captureView = self.view;
UIGraphicsBeginImageContextWithOptions(captureView.bounds.size, NO , 0.0f);
[captureView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage * screenshot = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil);

It works fine and saves JPG image to camera roll.

But problem is, There is another UIImageView on the top of my View, that UIImageView has a semi-transparent image in it. My screenshot doesn't preserve that transparency in the screenshot it is taking. I want to keep the transparency as it is in the actual screen.

How can you preserve the transparency in the screenshot?

Answer 1

If you specify "No" for the opaque property, your image must include an alpha channel for this to work. Check that your image has an alpha channel.