Create UIBarButtonItem Programmatically

In this Swift code example, you will learn how to:

• Create UIBarButtonItem programmatically,
• How to set right side bar button item(rightBarButtonItem),
• How to set left side bar button item(leftBarButtonItem),
• How to set target action on UIBarButtonItem to call a custom function when the button is tapped.

Below is a very simple code example in Swift that demonstrates how to create the UIBarButtonItem programmatically.

import UIKit
class ViewController: UIViewController {
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        let rightBarButton = UIBarButtonItem(title: "Done", style: UIBarButtonItem.Style.plain, target: self, action: #selector(self.myRightSideBarButtonItemTapped(_:)))
        self.navigationItem.rightBarButtonItem = rightBarButton
        
        
        let leftBarButton = UIBarButtonItem(title: "Edit", style: UIBarButtonItem.Style.done, target: self, action: #selector(self.myLeftSideBarButtonItemTapped(_:)))
        self.navigationItem.leftBarButtonItem = leftBarButton
        
    }
    
    @objc func myRightSideBarButtonItemTapped(_ sender:UIBarButtonItem!)
    {
        print("myRightSideBarButtonItemTapped")
    }
    
    @objc func myLeftSideBarButtonItemTapped(_ sender:UIBarButtonItem!)
    {
        print("myLeftSideBarButtonItemTapped")
    }
    
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
    
}

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