如何在导航项中使用“后退”按钮

Question

When a have an ViewController and insert Navigation Item create automatically a Back button. In my tableView i use an didSelectRowAtIndexPath to case into the ViewS and this views are using the same navigation Item, but dont create the back button.

Answer 1

The back buttons are created automatically on a push/segue. If you want to create this functionality yourself you would have to set the leftBarButtonItem property of the UINavigationItem and implement a method to call:

func backBTPressed() {
     self.navigationController.popViewControllerAnimated(yes)
}

See:

Add a back arrow to leftBarButtonItem?

creating back arrow shaped leftBarButtonItem on UINavigationController

Answer 2

You can also do a push in your previous view controller in the method tableView:didSelectedRowAtIndexPath:

 func tableView(tableView: UITableView, didDeselectRowAtIndexPath indexPath: NSIndexPath) {

  var newViewController = ..
  self.navigationController!.pushViewController(newViewController, animated: true)
 }

And it is done. The back button is already there.

Answer 3

You can try unwind segue. Check the following link.

Tutorial