leftbarbuttonitem does not show up in the navigation bar

Question

I\'ve been developing an iOS app and have been having issues with using an image as the left bar button item in the navigation bar. I have attempted this in the following wa

Answer 1

Updated for Swift 5:

let image = UIImage(named: "iconClose")
let button = UIBarButtonItem(image: image, style: .plain, target: self, action: #selector(self.cancel))
navigationItem.leftBarButtonItem = button