Question

What is the built in method which can be used to hide and show toolsbars. specifying a rate or speed of the animation?

Answer 1

Look at this question, and do something like:

[UIView animateWithDuration:2.0
            animations:^{ 
                [self.navigationController setToolbarHidden:YES animated:YES];
            } 
            completion:^(BOOL finished){
                        // whatever
            }];