From iOS 11, If you set LSSupportsOpeningDocumentsInPlace
to YES and UIFileSharingEnabled
to YES
in your Info.plist
, you can access your application Documents directory in the Files application.
<key>LSSupportsOpeningDocumentsInPlace</key>
<true/>
<key>UIFileSharingEnabled</key>
<true/>
For debugging purpose, before iOS 11 you can use FLEX. FLEX also contains a ton of useful debugging features like network request monitor, sqlite database browser etc.