iPhone. About action target again.

Question

This line of code is in AController.m

UIBarButtonItem *addButton = [[UIBarButtonItem alloc]
    initWithBarButtonSystemItem:UIBarButtonSystemItemAdd
    target:self
    action:@selector(addItem)];

And - (void) addItem:(id) sender; is also in AController.m

If I want to call a method - (void) addItem1:(id) sender; in BController.m, how can I change to make it work? What should I pass to the target parameter?

Many thanks!

Answer 1

You should pass an instance of BContorller. If you want more please comment, and I'll see what I can do in 1hr when I'm free.

    BCont=[[BController alloc] init];
    UIBarButtonItem *addButton = [[UIBarButtonItem alloc]
    initWithBarButtonSystemItem:UIBarButtonSystemItemAdd
    target:BCont
    action:@selector(addItem)];

Try that.

Answer 2

You have to pass a live instance of BController.

As an aside, an action method should technically have the form:

- (void) actionName:(id) sender;

Just the name with a sender parameter can work but sometimes the runtime gets snippy about it.