How to fire uibarbuttonitem click event programmatically

Question

I have created a UIActionSheet

UIActionSheet * action = [[UIActionSheet alloc]initWithTitle:@\"\"
                                                       


        

Answer 1

Not knowing the current bar button item action you can invoke it this way:

[barButtonItem.target performSelector:barButtonItem.action]

This will however bring "unknown selector" compiler warning, but this may be worked around.

Answer 2

For my case with RxCocoa I needed to provide a nil - object to the perform action otherwise it would crash with EXC_BAD_ACCESS:

let button = sut.navigationItem.leftBarButtonItem!
_ = button.target?.perform(button.action, with: nil)