Initialize Facebook Utils

I am trying to use the Parse login and sign up views. Specifically I am trying to log in using facebook with the parse login view.

Everything works fine except when i click the "login with facebook button" the app crashes. It gives me the following crash report

'You must initialize PFFacebookUtils with a call to +initializeFacebookWithApplicationLaunchOptions'

I have searched everywhere and apparently I am meant to add in [PFFacebookUtils initializeFacebook]; However initializeFacebook gives me an error, I think its outdated.

Apparently with the new code I am meant to write this [PFFacebookUtils initializeFacebookWithApplicationLaunchOptions:(NSDictionary *)launchOptions]; but it gives me an error when I try run the app saying 'You have to call setApplicationId:clientKey: on Parse to configure Parse.' which is weird because I have called setApplicationId?

Can anyone please help me out! It would be greatly appreciated, Thanks.