Implement the methods of this protocol in the delegate of a
QLPreview (Quick Look preview controller) object to:
- iOS 4.0+
Provide a zoom animation for Quick Look previews.
Specify whether or not your application opens a URL that the user taps in a preview
Respond to the opening or closing of a preview
The delegate of a
QLPreview object must adopt this protocol. The methods described here are optional but expected.