After looking around quite a bit it seems that there is no way to access the presenting segue from the UIViewController that it presents. I’m disappointed, because currently I’ll have to create a class for the sourceViewController just so I can use the “prepareForSegue” method.
I feel like if you use
- (void)performSegueWithIdentifier:(NSString *)identifier sender:(id)sender
you should be able to access the dang sender somehow!