title: iOS - import file from another app into my app
body: <p>I want to import a document from another app into my app like it's done in MS Outlook iOS app when you click the paperclip in an email. Then you get a list of apps (dropbox, google drive etc) + recent documents and you can select a document. </p>
  
  <p>How is this done / do I need to use the app-extensions for this ?</p>
  
  <p>thanks 
  Frank van Vliet </p>