如何在表格视图单元格中添加自定义UIButton？

Question

I have a custom UIButton that I need to add to my dynamic table view cell. None of the tutorials I've used has worked for me. My UIButton only appears when the cell is clicked, then quickly vanishes. When I click the button the app crashes and I get ...ViewController addButtonPressed]: unrecognized selector sent to instance . What do I need to do here?

class TableViewCell: UITableViewCell {

        @IBOutlet weak var addFriendButton: UIButton!

}

class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {

    @IBAction func addButtonPressed(sender: UIButton!) {
            println("Hey")
    }

    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

            var friendsCell = tableView.dequeueReusableCellWithIdentifier("AddFriendsCell", forIndexPath: indexPath) as! TableViewCell

            friendsCell.addFriendButton.tag = indexPath.row

            friendsCell.addFriendButton.addTarget(self, action: "addButtonPressed", forControlEvents: .TouchUpInside)

            return friendsCell

        }
}

Answer 1

try this: (add ' : ' in your selector name)

friendsCell.addFriendButton.addTarget(self, action: "addButtonPressed:", forControlEvents: .TouchUpInside)

I hope this will solve your problem of un recognised selector.

Answer 2

I am a bit confuse, the function below should not be an outlet:

@IBAction func addButtonPressed(sender: UIButton!) {
            println("Hey")
}

You should have a button in the TableViewCell and just a method in the ViewController, are they supposed to be the same button?

If so remove the bottom from the ViewController and its outlet and leave just the function to be called.