Question

I’ve got two classes A and B. In class A i use:

@interface A : B

In class B i’ve got this line of code:

self.navigationItem.rightBarButtonItem = [UIBarButtonItem barItemWithImage:[UIImage imageNamed:@"Add-button-normal"]
                                                          highlightedImage:[UIImage imageNamed:@"Add-button-active"]
                                                                    target:self
                                                                    action:@selector(showPopoverUI:)];

How can i access this items in class A, i try this line of code but it doesnt work:

self.navigationItem.rightBarButtonItem = [UIBarButtonItem barItemWithImage:[UIImage imageNamed:@"Add-button-normal"]
                                                          highlightedImage:[UIImage imageNamed:@"Add-button-active"]
                                                                    target:self.parentViewController
                                                                    action:@selector(showPopoverUI:)];

And i got this error:

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '+[B showPopoverUI:]: unrecognized selector sent to class 0x226308'

Answer 1

You are targeting the parentViewController in your second example, instead you should continue to target self.