How to add Facebook Like button into iphone game?

http://answers.unity3d.com/questions/435671/facebook-like-using-prime31-250-reward-.html

It's very simple to achieve this using SOOMLA's Profile SDK which is free for download on the Unity Asset Store: https://www.assetstore.unity3d.com/en/#!/content/24601

There's also an example app showing how to use it. You can replace the code SoomlaProfile.UpdateStatus to SoomlaProfile.Like to connect it to a Like button.