How to place UIBarButtonItem on the right side of a UIToolbar?

Question

I have designed a view with a toolbar that appears modally in Interface Builder. I have a UIBarButtonItem that is on the left hand side, which I would like to appear on the

Answer 1

Swift 3.x or above:

internal var textFieldHandlerToolBar: UIToolbar = {
        let tb = UIToolbar.init(frame: CGRect.init(origin: .zero, size: CGSize.init(width: UIScreen.screenSize().width, height: 44.0)))
        let flexibleButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.flexibleSpace, target: nil, action: nil)
        let doneBarButton = UIBarButtonItem.init(title: "Done", style: UIBarButtonItemStyle.done, target: self, action: #selector(actionDonePickerSelection))
        tb.setItems([flexibleButton, doneBarButton], animated: false)
        return tb
    }()

Output: