Don't have delete button when swipe on table row

Question

I create new project, Then add TableView to ViewController, set dataSource and delegate to View Controller, Add one prototype cell with Basic style and identifier "cell". My ViewController.swift class:

class ViewController: UIViewController, UITableViewDelegate{

    var numbers = ["One","Two","Three","Four","Five","Six","Seven","Eight","Nine","Ten"]

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


    func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return numbers.count
    }

    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath!) -> UITableViewCell {
        var cell = tableView.dequeueReusableCellWithIdentifier("cell") as? UITableViewCell
        cell?.textLabel.text = numbers[indexPath.row]

        return cell!
    }

    func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
        if editingStyle == UITableViewCellEditingStyle.Delete {
            numbers.removeAtIndex(indexPath.row)
            tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic)
        }
    }

}

When I swipe row, it moving but delete button is missing. Where I am wrong?

Answer 1

Just replicated your project. Delete button is there.

You should check the constraints of your table view to make sure it does not inadvertently extend beyond the right edge of the screen.