How to associate a method with this button?

Question

I have a navigation bar button that displays both image and text. This is the code:

UIImage *saveImage = [UIImage imageNamed:@"star.png"];

UIButton *saveButton = [UIButton buttonWithType:UIButtonTypeCustom];

[saveButton setBackgroundImage:saveImage forState:UIControlStateNormal];
[saveButton setTitle:@"Save" forState:UIControlStateNormal];

saveButton.frame = (CGRect) {
    .size.width = 100,
    .size.height = 30,
};

UIBarButtonItem *barButton= [[UIBarButtonItem alloc] initWithCustomView:saveButton];

[self.navigationItem setRightBarButtonItem:barButton animated:YES];

I tried this

[barButton setAction:@selector(saveArray)];

but it doesn't work.

Answer 1

Remember that you must specify target as well. You can set action/target to the UIButton object itself:

[saveButton addTarget:target action:@selector(saveArray) forControlEvents:UIControlEventTouchUpInside];

I've tried to set target/action to the UIBarButtonItem directly but it seems not to work in case of UIButton for custom view for some reason.

Answer 2

Did you remember to set the target? If the desired method belongs to the same class, you could do:

[barButton setTarget:self];

That said, action and target are both properties (new to Obj-C 2.0), consider using the dot notation:

barButton.action = @selector(saveArray:)
barButton.target = self;