How to make ok button active in UIAlertviewController?

Question

I am getting an error when I start typing text in a UITextfield:
unrecognized selector sent to instance

var inputTextField: UITextField!
let alertController = UIAlertController(title: "User Name", message: "Enter your new ideatrr name", preferredStyle: .Alert)

let nextAction: UIAlertAction = UIAlertAction(title: "Update", style: .Default) { action -> Void in
        if inputTextField!.text == "" {
            println("blank text")
        }
    }

nextAction.enabled = false

let cancel = UIAlertAction(title: "Cancel", style: .Cancel) { (action) -> Void in
    alertController.addAction(nextAction)
    alertController.addAction(cancel)

    alertController.addTextFieldWithConfigurationHandler { (textField) -> Void in
        inputTextField = textField
        inputTextField.placeholder = "Enter your name"
        inputTextField.addTarget(self, action: "textFieldDidChange:", forControlEvents: UIControlEvents.EditingChanged)  
    }

    presentViewController(alertController, animated: true, completion: nil)

    func textFieldDidChange(inputTextField: UITextField!) {
        if inputTextField.text.isEmpty {
            nextAction.enabled = true
        } else {
            println("ddddd")
        }
    }
}

score 0 · Answer 1 · answered Aug 07 '15 at 18:18

0

The function textFieldDidChange: needs to be an instance method of whatever class you're working in. If you move textFieldDidChange: into your class definition, you should be good to go.

answered Aug 07 '15 at 18:18

rudd

846
7
17

can you please make this code active , i am still getting the same error? – Vivek Singh Aug 08 '15 at 16:31
Please paste the entire containing function of your code into the question above first, that'll help – rudd Aug 10 '15 at 21:36

How to make ok button active in UIAlertviewController?

1 Answers1