I'm using PFLoginViewController and instead of presenting it modally, I am presenting it as a subview so I can have a nice translucent background:

The only issue is that when I select Sign Up, it presents my Sign Up view controller modally which according to my console log, isn't the smartest idea: Presenting view controllers on detached view controllers is discouraged
So what I would like to do is use a separate method for displaying my sign up view controller. I tried this:
[loginView.logInView.signUpButton addTarget:self action:@selector(presentSignUpView:) forControlEvents:UIControlEventTouchUpInside];
But the original Parse method was being called with my custom method being called in addition. I looked at the docs and there is no delegate method for adding your own custom method so how should I go about doing this?