How to access all documents on an iOS device?

I am writing app that requires a user to select a document (PDF, DOC, image ETC) from a list of d开发者_Python百科ocuments stored locally. How do I get about accessing such a dialog? That is do I write something that can populate a tableview or is there some pre-existing dialog that can be used?

Thank you and I hope I am making sense.

You have to implement your own dialog, typically as a subclass of UITableViewController, there is no built-in UI for selecting files.