Question

When I set

[self presentModalViewController:Facebookcontroller animated:YES];

to

[self presentViewController:Facebookcontroller animated:YES completion:nil];

to erase the presentModalViewController:animated is deprecated: first deprecated in iOS 6.0

pops another warning:

Instance method ‘-presentModalViewController:animated:completion:’ not found (return type defaults yo ‘id’)

Answer 1

1. Are you sure self is a UIViewController in this context. You can call this code only from another UIViewController.

2. Make sure you initialize the Facebookcontroller class first, you cannot pass just the class. Facebookcontroller *facebookController = Facebookcontroller alloc] init];

For iOS 6 use:

[self presentViewController:Facebookcontroller animated:YES completion:^{
    //Do whatever you want to do when the controller 'Facebookcontroller' is presented.
}];

or

[self presentViewController:Facebookcontroller animated:YES completion:nil];

You can find the reference here.