TC-5838 - Code

gistfile1.txt

tiapp.xml (condensed to relevant bits):
<ios>
      <plist>
          <dict>
          
          
          <key>CFBundleURLTypes</key>
          <array>
              <dict>
                  <key>CFBundleURLName</key>
                  <!-- Application ID same as the id value in the tiapp.xml file -->
                  <string>ca.appname.m</string>
                  <key>CFBundleURLSchemes</key>
                  <array>
                      <!-- Prefix the Facebook App ID with 'fb' -->
                      <string>fb111111111111</string>
                  </array>
              </dict>
          </array>
          <key>FacebookAppID</key>
                <!-- Facebook App ID -->
                <string>11111111111111</string>
                <key>FacebookDisplayName</key>
                <!-- Facebook App Name from developer.facebook.com -->
                <string>FB Mobile App Name</string>
                <key>LSApplicationQueriesSchemes</key>
                <array>
                    <string>fbapi</string>
                    <string>fb-messenger-api</string>
                    <string>fbauth2</string>
                    <string>fbshareextension</string>
                </array>
            </dict>
      </plist>
  <min-ios-ver>7.0</min-ios-ver>
</ios>

Javascript:
  var fb = require('facebook');
  fb.initialize();
  
  fb.presentShareDialog({
    link: 'https://appcelerator.com/',
    title: 'great product',
    description: 'Titanium is a great product',                    
    picture: 'http://www.appcelerator.com/wp-content/uploads/scale_triangle1.png'
  });