title: Exploring iOS files in Delphi FireMonkey app
body: <p>I am developing a document viewer that handles a custom file type for iOS. Users should be able to open documents from inside the App, even if the files are not saved somewhere in the App's local Directory.<br/>
  Is there any way to provide my Users with an file-explorer-like structure inside my App?<br/><br/></p>
  <p><strong>What I've already tried:</strong><br/>
  My first guess was to just create my own explorer by using <code>TPath</code> and <code>TDirectory</code> from <code>System.IOUtils</code> and rendering a list of all files and subdirectories at a given Path.<br/>
  This already worked in the respective Android App and I also got it to run using only paths inside my App's private directory.<br/>
  Sadly <code>TPath</code> only provides these local paths and I didn't find any other path I could use to browse files anywhere else on the device.<br/><br/>
  Reading the Apple Developer Documentation I also found out that my problem would be fixed by just using a <code>UIDocumentPickerViewController</code> but it isn't implemented in the <code>iOSAPI</code>, is there maybe another way to trigger iOS to show one?<br/><br/></p>
  <p>I am using the following Versions:<br/>
  Delphi 10.4 Sydney Patch 3<br/>
  Platform Assistant Server 21.0<br/>
  macOS Catalina 10.15.6<br/>
  Xcode 11.7<br/>
  iPhone 7 with iOS 13.7</p>