CODEWITHSUNDEEP
swiftuigesturerecognizer
Hunter
Hunter

Reputation: 1391

How to add a double tap Gesture Recognizer in Swift

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)
    }
}

Upvotes: 17

Views: 28225

Answers (5)

Marian König
Marian König

Reputation: 784

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")
    }
}

Upvotes: 14

Roman Barzyczak
Roman Barzyczak

Reputation: 3813

More Swifty way:

view?.tap(numberOfTapsRequired: 2, action: action)

Closure:

private lazy var action: Action = Action(action: {[weak self] _ in
    print("Double click")
})

It's very important not to lose reference to your action (you can make it as field like in above example).

by using this UIView extension: https://gist.github.com/yoman07/7aae5abb957ff656b2f118ad1e6c2d36

Upvotes: 0

Waseem Sarwar
Waseem Sarwar

Reputation: 2725

     // 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

Upvotes: 31

Ramkumar chintala
Ramkumar chintala

Reputation: 958

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)
}
}

Upvotes: 9

Patrick
Patrick

Reputation: 7205

Here is some example code for a single and double tap action.

Notice that the single tap action has a colon (handleSingleTap:) but the double tap action does not (handleDoubleTap)? This indicates that the selector takes an argument. So in the functions below, we can check the sender of the single tap which would be useful if you were assigning the tap function to many elements. If you have the colon you must have the parameters in the function.

override func viewDidLoad() {
    super.viewDidLoad()

    // Single Tap
    let singleTap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "handleSingleTap:")
    singleTap.numberOfTapsRequired = 1
    self.view.addGestureRecognizer(singleTap)

    // Double Tap
    let doubleTap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "handleDoubleTap")
    doubleTap.numberOfTapsRequired = 2
    self.view.addGestureRecognizer(doubleTap)
}

func handleSingleTap(sender: AnyObject?) {
    print("Single Tap!")
}
func handleDoubleTap() {
    print("Double Tap!")
}

Note: this example will run the single tap action in a double tap.

Upvotes: 6

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