how to use responseToSelector in swift?

Asked Dec 14 '15 at 07:55

Active Dec 14 '15 at 08:06

Viewed 45 times

In my swift project, I have my custom delegate class. Like in objective-c, I can use my delegate

[self.delegate respondsToSelector:@selector(cancelButtonClicked:)]

But I cannot use it in swift.

here is my code

import UIKit

protocol Popup1ViewcontrollerDelegate {
func cancelButtonClicked(sender:Popup1ViewController)
}

class Popup1ViewController: WCViewController {

var delegate : Popup1ViewcontrollerDelegate?

override func viewDidLoad() {
    super.viewDidLoad()

    // Do any additional setup after loading the view.
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
}

@IBAction func close(sender: AnyObject) {
    if (self.delegate && self.delegaterespondsToSelector("cancelActionClicked:")) {
        self.delegate?.cancelButtonClicked(self)
    }
}
}

and error image

edited Dec 14 '15 at 08:06

asked Dec 14 '15 at 07:55

vichhai

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Please post your code as text, not as screenshot. – KittMedia Dec 14 '15 at 07:56
@KittMedia yes. Please help me. – vichhai Dec 14 '15 at 08:04
Go back to the WWDC videos, and look at the very, very, _very_ first video which answers exactly that question and points out how much better Swift is for not needing respondsToSelector. – gnasher729 Dec 14 '15 at 09:16

how to use responseToSelector in swift?

0 Answers0