Tells the delegate that the user has selected one or more documents.
The current document browser.
An array of URLs for the selected documents.
If the document browser's
allowsPickingMultipleItems property is
YES, the array contains one or more URLs. If
NO, it contains only a single URL.
Implement this method to process the documents selected by the user. Typically, you create a view controller to display the selected documents, then present that view modally (see Listing 1).