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

In Swift 5

//For righter button item
let rightBtn = UIBarButtonItem(image: UIImage(named: "rightmenu"), style: .plain, target: self, action: #selector(onClickMethod))//Change your function name and image name here
self.navigationItem.rightBarButtonItem = rightBtn
//self.navigationItem.rightBarButtonItem = [rightBtn, anotherBtn] //If you want to add more buttons add like this

//For left bar button item
let leftBtn = UIBarButtonItem(image: UIImage(named: "rightmenu"), style: .plain, target: self, action: #selector(onClickMethod)) //Change your function name and image name here
self.navigationItem.leftItemsSupplementBackButton = true
self.navigationItem.leftBarButtonItem = leftBtn
//self.navigationItem.leftBarButtonItems = [leftBtn, anotherBtn] //If you want to add more buttons add like this

//This is your function name
@objc func onClickMethod() {
    print("Left bar button item")
}