How to add an action to a UITextField using selector

Question

After viewing different options on the Internet, I never found a working implementation option how to do it. I just want to add listener to UITextField. Have some code

class RegisterViewController: UIViewController, UITextFieldDelegate

  @IBOutlet weak var textRegion: UITextField!

textRegion.addTarget(self, action: Selector(("myTargetFunction:")), for: UIControlEvents.touchDown)
    func myTargetFunction() {
        print("It works!")
    }

but it does not work, have THREAD 1 : SIGNAL SIGABRT

Possible duplicate of [@selector() in Swift?](https://stackoverflow.com/questions/24007650/selector-in-swift) — Dávid Pásztor, Sep 05 '17 at 09:00

score 1 · Accepted Answer · answered Sep 05 '17 at 09:03

1

You have the wrong syntax for your selector. Use this one instead #selector(myTargetFunction).

The entire code:

In your viewDidLoad:

textRegion.addTarget(self, action: #selector(myTargetFunction), for: UIControlEvents.touchDown)

And then declare the function:

func myTargetFunction(textField: UITextField) {
    print("touchDown for \(textField.tag)")
}

answered Sep 05 '17 at 09:03

Rashwan L

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Error Argument of '#selector' cannot refer to local function 'myTargetFunction(textField:)' – Romik romikromik Sep 05 '17 at 09:21
`func myTargetFunction(textField: UITextField) { ... }` need to be outside of `viewDidLoad`, it is right? – Rashwan L Sep 05 '17 at 09:22

How to add an action to a UITextField using selector

1 Answers1