Using FaceBook SDK on Unity 4.6

Questions & Answers
1

If you are using the FaceBook SDK on the new beta you will get the following error on calling FB.Init()

Could not securely load assembly from https://integrated-plugin-canvas-rsrc.fbsbx.com/rsrc/unity/lib/sdk_5.1/CanvasFacebook.dll
UnityEngine.Debug:LogError(Object)
FbDebug:Error(String)
<LoadFacebookClass>c__Iterator9:MoveNext() (at Assets/Generic Scripts/Facebook/Scripts/FB.cs:396)

Solution below

2

Open FB.cs

Go to line 380. Find the following code:

#if UNITY_4_5
            var authTokenWww = new WWW(IntegratedPluginCanvasLocation.KeyUrl);
            yield return authTokenWww;
            if (authTokenWww.error != null)
            {
                FbDebug.Error("Cannot load from " + IntegratedPluginCanvasLocation.KeyUrl + ": " + authTokenWww.error);
                authTokenWww.Dispose();
                yield break;
            }
            var assembly = Security.LoadAndVerifyAssembly(www.bytes, authTokenWww.text);
#else
            var assembly = Security.LoadAndVerifyAssembly(www.bytes);
#endif

Change it as follows (taking out the #if Unity_4_5 and everything in the else block)

        var authTokenWww = new WWW(IntegratedPluginCanvasLocation.KeyUrl);
        yield return authTokenWww;
        if (authTokenWww.error != null)
        {
            FbDebug.Error("Cannot load from " + IntegratedPluginCanvasLocation.KeyUrl + ": " + authTokenWww.error);
            authTokenWww.Dispose();
            yield break;
        }
        var assembly = Security.LoadAndVerifyAssembly(www.bytes, authTokenWww.text);

I’m sure Facebook will catch it in a future version of the SDK

3

For Unity 5.1 users and Facebook 6.2.2. Expanding condition in FB.cs in line 411 with || UNITY_5_1 helped me.

4

#if UNITY_4_5 || UNITY_4_6 || UNITY_5_0 || UNITY_5