How to programmatically set action for barButtonItem in swift 3?

Here is what I used previously,

var barButtonItem = UIBarButtonItem(image: backImgs, style: UIBarButtonItemStyle.plain, target: self, action: Selector("menuButtonTapped:"))

But there is some syntax changes for Swift 3.

ex:-

navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Add", style: .plain, target: self, action: #selector(addTapped))

Summarize the mostly used method in Swift 3 for adding action to a barButton.

1. Barbutton with text

   navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Add", style: .plain, target: self, action: #selector(addTapped))
   

2. BarButton with your own image

   navigationItem.rightBarButtonItem = UIBarButtonItem(image: UIImage(named:"add"), style: .plain, target: self, action: #selector(addTapped))
   

3. BarButton with system image

   navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .add, target: self, action: #selector(addTapped))
   

If anyone is using customView:

barButtonItem.customView?.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(onBarButtonItemClicked)))

You just need to change your selector syntax as of from Swift 3 you need to specify the first parameter name of method in your function call so change your selector like this.

#selector(menuButtonTapped(sender:))

And your method should be like this.

func menuButtonTapped(sender: UIBarButtonItem) {

}

One line of code on Swift 3 for iOS 10.1:

navigationController?.navigationBar.topItem?.rightBarButtonItem = UIBarButtonItem(title: "Add", style: .plain, target: self, action: nil)