How to set target and action for UIBarButtonItem at runtime

Set target and action of your UIBarButtonItem

Swift 5 & 4

button.target = self
button.action = #selector(action)

@objc func action (sender:UIButton) {
    print("action")
}

UIBarButtonItem doesnt have the same addTarget method so you have to set them directly as follows

btn.target = self;
btn.action = @selector(barButtonCustomPressed:);

...

// can specify UIBarButtonItem instead of id for this case
-(IBAction)barButtonCustomPressed:(UIBarButtonItem*)btn 
{
    NSLog(@"button tapped %@", btn.title);
}

Just set the UIBarButtonItem's target and action properties directly.