In Xcode, under Info tab, what's Role for in U

问题:

In Xcode, under Info tab, what's Role dropdown in URL Types section for? The valid value for this is Editor, Viewer, None.

回答1:

It represents what your app can do with the URL / file type.

• Editor == read and write.
• Viewer == read only.
• None == can't use at all.

This flag isn't used by iOS.