title: ARKit World Maps – How To Save/Access Using A Custom UTI File Type?
body: <p>I cannot locate any documentation specifically listing the type of file that ARKit saves its World Map as. As far as I know it is a <code>.arexperience</code> file. Essentially I am trying to modify a document browser to be able to selectively choose which <code>.arexperience</code> file to load. </p>
  
  <p>I have attempted to enable the supported document types, specifically as <code>public.arexperience</code> with the LSHandlerRank as type String and Value as Alternate, as well as a CFBundleTypeRole as Type String and Value as Viewer. </p>
  
  <p>I have also set Supports Document Browser to <em>YES</em> in info.plist
  <a href="https://i.stack.imgur.com/xAZeC.png" rel="nofollow noreferrer">Additional document type properties</a>.</p>
  
  <p>9.7.18 EDIT: I am now receiving the following error. Any thoughts on this? I have cleaned the build folder, closed XCode, uninstalled and reinstalled the project, and restarted my computer, but no change. <a href="https://i.stack.imgur.com/jvIEo.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/jvIEo.png" alt="Command CompileSwift failed with a nonzero exit code"></a></p>
  
  <p>9.13.18 EDIT: This error is resulting from a fresh install of both XCode 10 Beta (which includes Swift 4.2) and your sample project. Any idea what's going on? Research indicates a SIGABRT error is the result of an unused outlet, but using the assistant editor which let's me view the connections doesn't display a clear problem...<a href="https://i.stack.imgur.com/ltYA0.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ltYA0.png" alt="enter image description here"></a></p>