How to set target and action for UIBarButtonItem at runtime

Question

Tried this but only works for UIButton:

[btn setTarget:self action:@selector(btnClicked:) forControlEvents:UIControlEventTouchUpInside];

Answer 1

Swift 5:

Extract to extensions:

extension UIBarButtonItem {

    static func nextBtn(target: AnyObject, action: Selector) -> UIBarButtonItem {
        let title = "Next"
        return button(title: title, target: target, action: action)
    }

    private static func button(title: String, target: AnyObject, action: Selector) -> UIBarButtonItem {
        return UIBarButtonItem(title: title, style: .done, target: target, action: action)
    }

}

Call in code:

navigationItem.rightBarButtonItem = .nextBtn(target: self, action: #selector(rightBarButtonAction))

Action:

@objc func rightBarButtonAction() {
    Swift.print("Button tapped!")
}

Pretty easy to add new buttons to this factory.