使用IOS应用程序中的iTunes导入和导出文件

I work with Xcode 7 and Swift 2 for create an IOS app. I want my users to import file in my application and recover the IOS device by connecting to iTunes. I would have to can access the file from my code ... Here is a sample application that offers this principle (VLC, Excel ...). And here's a screen for you to understand! ;) I work with Xcode 7 and Swift 2 for create an I