Follow these three steps:
- Create a key called FacebookAppID with a string value, and add the app ID there.
- Create a key called FacebookDisplayName with a string value, and add the Display Name you configured in the App Dashboard.
- Create an array key called URL types with a single array sub-item called URL Schemes. Give this a single item with your app ID prefixed with fb. This is used to ensure the application will receive the callback URL of the web-based OAuth flow.
The finished .plist should look something like this: