title: Making share extension with custom layout
body: <p>I want to develop ios share extention with custom callout. In apple documents</p>
  
  <blockquote>
    <p>To provide a custom compose view instead of the standard one, deselect
    “Use standard social compose interface” in the Xcode target-adding
    pane. When this checkbox is deselected, the default
    SharingViewController class is based on NSViewController or
    UIViewController, depending on the platform you chose.</p>
  </blockquote>
  
  <p>but I can't find the check box. Can anyone show me how to disable it and is there any good tutorials for share extention.</p>
  
  <p>Thanks</p>