How to programmatically set action for barButtonItem in swift 3?

Question

Here is what I used previously,

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


        

Answer 1

Make a UIBarButtonItem:

let rightButton: UIBarButtonItem = UIBarButtonItem(title: "Done", style: UIBarButtonItemStyle.done, target: self, action: #selector(LocationViewController.doneButtonClicked(_:)))

Add to NavigationItem:

self.navigationItem.rightBarButtonItem = rightButton

Associated function:

func doneButtonClicked(_ button:UIBarButtonItem!){    
    print("Done clicked")    
}