UISwipeGestureRecognizer throw unrecognised selector sent error

Question

I am getting unrecognized selector sent error in my iOS application. I tried solving the issue based on the answers mentioned in other similar thread but failed. Please have a look at the code below and help me with this.

Thanks

class ThirdViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.



        let leftSwipe = UISwipeGestureRecognizer(target: self, action:  Selector(("HandleSwipes:")))

        let rightSwipe = UISwipeGestureRecognizer(target: self, action:   Selector(("HandleSwipes:")))

        leftSwipe.direction = .left
        rightSwipe.direction = .right


        view.addGestureRecognizer(leftSwipe)
        view.addGestureRecognizer(rightSwipe)



    }



    func HandleSwipes(sender: UISwipeGestureRecognizer) {

        //if(sender.direction == .left)
        //{
        //    tabBarController?.selectedIndex = 1
        //}
    }
}

@Vyshakh - check the updated answer – Anbu.Karthik Sep 20 '16 at 06:01 — Anbu.Karthik, Sep 20 '16 at 06:01

score 5 · Accepted Answer · answered Sep 20 '16 at 05:50

Write selector like this.

Swift 2.3 or lower.

let leftSwipe = UISwipeGestureRecognizer(target: self, action: #selector(HandleSwipes(_:)))
let rightSwipe = UISwipeGestureRecognizer(target: self, action: #selector(HandleSwipes(_:)))

Swift 3

let leftSwipe = UISwipeGestureRecognizer(target: self, action: #selector(HandleSwipes(sender:)))
let rightSwipe = UISwipeGestureRecognizer(target: self, action: #selector(HandleSwipes(sender:)))

Note: One suggestion it is batter method name always start with lower case not upper case. So it is batter if you use handleSwipes instead of HandleSwipes.

score 2 · Answer 2 · answered Sep 20 '16 at 06:00

you need to call like

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


    let leftSwipe = UISwipeGestureRecognizer(target: self, action: #selector(HandleSwipes(_:)))

    let rightSwipe = UISwipeGestureRecognizer(target: self, action: #selector(HandleSwipes(_:)))

    leftSwipe.direction = .left
    rightSwipe.direction = .right


    view.addGestureRecognizer(leftSwipe)
    view.addGestureRecognizer(rightSwipe)
}

call method like

func HandleSwipes(_ sender: UISwipeGestureRecognizer){

    if(sender.direction == .left)
    {
       print("Swiped left")
    }
}

UISwipeGestureRecognizer throw unrecognised selector sent error

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