How to add a double tap Gesture Recognizer in Swift

Question

I have already accomplished a single tap recognizer but can not figure out how to make that single tap recognizer a double tap instead. I could use some guidance.

Code:

import Foundation
import UIKit

class MainBoardController: UIViewController{

    let tap = UITapGestureRecognizer()

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        var swipe: UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: "GotoProfile")
        swipe.direction = UISwipeGestureRecognizerDirection.Right
                    self.view.addGestureRecognizer(swipe)

        tap.addTarget(self, action: "GotoCamera")
        view.userInteractionEnabled = true
        view.addGestureRecognizer(tap)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    func GotoProfile(){
        self.performSegueWithIdentifier("Profilesegue", sender: nil)
    }

    func GotoCamera(){
        self.performSegueWithIdentifier("Camerasegue", sender: nil)
    }
}

Answer 1

     // Single Tap
    let singleTap: UITapGestureRecognizer =  UITapGestureRecognizer(target: self, action: #selector(PostDetailViewController.handleSingleTap(sender:)))
    singleTap.numberOfTapsRequired = 1
    self.viewTop.addGestureRecognizer(singleTap)

    // Double Tap
    let doubleTap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(PostDetailViewController.handleDoubleTap))
    doubleTap.numberOfTapsRequired = 2
    self.viewTop.addGestureRecognizer(doubleTap)

    singleTap.require(toFail: doubleTap)
    singleTap.delaysTouchesBegan = true
    doubleTap.delaysTouchesBegan = true

   func handleSingleTap(sender: AnyObject?) {

    print("Single Tap!")

   }
   func handleDoubleTap() {

    print("Double Tap!")
   }

Magic in below three lines

    singleTap.require(toFail: doubleTap)
    singleTap.delaysTouchesBegan = true
    doubleTap.delaysTouchesBegan = true

Answer 2

I solved this with an extension:

override func viewDidLoad() {
    super.viewDidLoad()
            
    let tapGR = UITapGestureRecognizer(target: self, action: #selector(PostlistViewController.handleTap(_:)))
    tapGR.delegate = self
    tapGR.numberOfTapsRequired = 2
    view.addGestureRecognizer(tapGR)
}

---

extension MainBoardController: UIGestureRecognizerDelegate {
    func handleTap(_ gesture: UITapGestureRecognizer){
        print("doubletapped")
    }
}

Answer 3

Try Below Code

import UIKit

class MainBoardController: UIViewController{

let tap = UITapGestureRecognizer()

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    var swipe: UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: "GotoProfile")
    swipe.direction = UISwipeGestureRecognizerDirection.Right
    self.view.addGestureRecognizer(swipe)

    // DOUBLE TAP
    tap.numberOfTapsRequired = 2
    tap.addTarget(self, action: "GotoCamera")
    view.userInteractionEnabled = true
    view.addGestureRecognizer(tap)
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

func GotoProfile(){
    self.performSegueWithIdentifier("Profilesegue", sender: nil)
}

func GotoCamera(){
    self.performSegueWithIdentifier("Camerasegue", sender: nil)
}
}