NavigationBar BACK按钮不起作用

Question

I have a NavigationViewController which root is a regular UIViewController. I present a TableViewController programatically by:

self.performSegue(withIdentifier: "showTableViewVC", sender: nil)

This TableViewVC is showing the BACK button but it is not working at all.

The segue to this TableViewVC is a "show/push" segue.

How to navigate back to the UIViewController?

Answer 1

1. Add a UIBarbutton into navigation controller in showTableViewVC.

override func viewDidLoad() {

     super.viewDidLoad()

     let backBarButton = UIBarButtonItem.init(barButtonSystemItem: .add, target: self, action: #selector(backButtonTapped(sender:))) as UIBarButtonItem 

     self.navigationItem.setLeftBarButton(backBarButton, animated: true)  

}

2. Implement back button Action.

func backButtonTapped(sender: UIBarButtonItem) 
{
    self.navigationController?.popViewController(animated: true)
}