Question

I have a method addClicked that gets called when a button on the navigation bar is clicked. I want to call this later on in the code without having to click the button. What is the syntax for calling this method?

    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] 
                                             initWithBarButtonSystemItem:UIBarButtonSystemItemAdd 
                                             target:self action:@selector(add_Clicked:)];

The function is calls looks like this:

- (void) add_Clicked:(id)sender {

I tried:

[self add_Clicked:];

[add_Clicked:];

[self add_Clicked: self];

The last works but I’m not sure why. Can someone provide a link to the doc the would explain how this works?

Answer 1

You have to pass something for the sender. That’s why the last one works.

Try [self add_Clicked:nil]