Как распознать свайп во всех 4 направлениях

Вам необходимо иметь по одному UISwipeGestureRecognizer для каждого направления. Это немного странно, потому что свойство UISwipeGestureRecognizer.direction представляет собой битовую маску в стиле параметров, но каждый распознаватель может обрабатывать только одно направление. Вы можете отправить их все одному обработчику, если хотите, и отсортировать их там или отправить их разным обработчикам. Вот одна реализация:

override func viewDidLoad() {
    super.viewDidLoad()

    let swipeRight = UISwipeGestureRecognizer(target: self, action: #selector(respondToSwipeGesture))
    swipeRight.direction = .right
    self.view.addGestureRecognizer(swipeRight)

    let swipeDown = UISwipeGestureRecognizer(target: self, action: #selector(respondToSwipeGesture))
    swipeDown.direction = .down
    self.view.addGestureRecognizer(swipeDown)
}

@objc func respondToSwipeGesture(gesture: UIGestureRecognizer) {

    if let swipeGesture = gesture as? UISwipeGestureRecognizer {

        switch swipeGesture.direction {
        case .right:
            print("Swiped right")
        case .down:
            print("Swiped down")
        case .left:
            print("Swiped left")
        case .up:
            print("Swiped up")
        default:
            break
        }
    }
}

Swift 3:

override func viewDidLoad() {
    super.viewDidLoad()

    let swipeRight = UISwipeGestureRecognizer(target: self, action: #selector(self.respondToSwipeGesture))
    swipeRight.direction = UISwipeGestureRecognizerDirection.right
    self.view.addGestureRecognizer(swipeRight)

    let swipeDown = UISwipeGestureRecognizer(target: self, action: #selector(self.respondToSwipeGesture))
    swipeDown.direction = UISwipeGestureRecognizerDirection.down
    self.view.addGestureRecognizer(swipeDown)
}

func respondToSwipeGesture(gesture: UIGestureRecognizer) {
    if let swipeGesture = gesture as? UISwipeGestureRecognizer {
        switch swipeGesture.direction {
        case UISwipeGestureRecognizerDirection.right:
            print("Swiped right")
        case UISwipeGestureRecognizerDirection.down:
            print("Swiped down")
        case UISwipeGestureRecognizerDirection.left:
            print("Swiped left")
        case UISwipeGestureRecognizerDirection.up:
            print("Swiped up")
        default:
            break
        }
    }
}

Мне просто захотелось внести свой вклад, в итоге выглядит более элегантно:

func addSwipe() {
    let directions: [UISwipeGestureRecognizerDirection] = [.Right, .Left, .Up, .Down]
    for direction in directions {
        let gesture = UISwipeGestureRecognizer(target: self, action: Selector("handleSwipe:"))
        gesture.direction = direction
        self.addGestureRecognizer(gesture)
    }
}

func handleSwipe(sender: UISwipeGestureRecognizer) {
    print(sender.direction)
}

Из раскадровки:

1. Добавьте в представление четыре распознавателя жестов смахивания.
2. Задайте для каждого целевое направление из инспектора атрибутов. Вы можете выбрать вправо, влево, вверх или вниз
3. Один за другим выберите распознаватель жестов смахивания, нажмите Ctrl + перетащите на контроллер просмотра. Вставьте имя (скажем, leftGesture, rightGesture, upGesture и downGesture), измените соединение на: Action и введите: UISwipeGestureRecognizer

Из вашего viewController:

@IBAction func rightGesture(sender: UISwipeGestureRecognizer) {
    print("Right")
}
@IBAction func leftGesture(sender: UISwipeGestureRecognizer) {
    print("Left")
}
@IBAction func upGesture(sender: UISwipeGestureRecognizer) {
    print("Up")
}

@IBAction func downGesture(sender: UISwipeGestureRecognizer) {
    print("Down")
}  

Похоже, что за последнее время все изменилось. В XCode 7.2 работает следующий подход:

override func viewDidLoad() {
    super.viewDidLoad()

    let swipeGesture = UISwipeGestureRecognizer(target: self, action: "handleSwipe:")
    swipeGesture.direction = [.Down, .Up]
    self.view.addGestureRecognizer(swipeGesture)
}

func handleSwipe(sender: UISwipeGestureRecognizer) {
    print(sender.direction)
}

Проверено в симуляторе на iOS 8.4 и 9.2 и на реальном устройстве 9.2.

Или, используя удобное расширение mlcollard, здесь:

let swipeGesture = UISwipeGestureRecognizer() {
    print("Gesture recognized !")
}

swipeGesture.direction = [.Down, .Up]
self.view.addGestureRecognizer(swipeGesture)

Apple Swift версии 3.1 - Xcode версии 8.3 (8E162)

Удобный способ из подхода Александра Кассаньи

let directions: [UISwipeGestureRecognizerDirection] = [.up, .down, .right, .left]
for direction in directions {
    let gesture = UISwipeGestureRecognizer(target: self, action: #selector(YourClassName.handleSwipe(gesture:)))
    gesture.direction = direction
    self.view?.addGestureRecognizer(gesture)   
}

func handleSwipe(gesture: UISwipeGestureRecognizer) {
    print(gesture.direction)
    switch gesture.direction {
    case UISwipeGestureRecognizerDirection.down:
        print("down swipe")
    case UISwipeGestureRecognizerDirection.up:
        print("up swipe")
    case UISwipeGestureRecognizerDirection.left:
        print("left swipe")
    case UISwipeGestureRecognizerDirection.right:
        print("right swipe")
    default:
        print("other swipe")
    }
}

В Swift 4.2 и Xcode 9.4.1

Добавьте делегата анимации CAAnimationDelegate в свой класс

//Swipe gesture for left and right
let swipeFromRight = UISwipeGestureRecognizer(target: self, action: #selector(didSwipeLeft))
swipeFromRight.direction = UISwipeGestureRecognizerDirection.left
menuTransparentView.addGestureRecognizer(swipeFromRight)

let swipeFromLeft = UISwipeGestureRecognizer(target: self, action: #selector(didSwipeRight))
swipeFromLeft.direction = UISwipeGestureRecognizerDirection.right
menuTransparentView.addGestureRecognizer(swipeFromLeft)

//Swipe gesture selector function
@objc func didSwipeLeft(gesture: UIGestureRecognizer) {
    //We can add some animation also
    DispatchQueue.main.async(execute: {
            let animation = CATransition()
            animation.type = kCATransitionReveal
            animation.subtype = kCATransitionFromRight
            animation.duration = 0.5
            animation.delegate = self
            animation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
            //Add this animation to your view
            self.transparentView.layer.add(animation, forKey: nil)
            self.transparentView.removeFromSuperview()//Remove or hide your view if requirement.
        })
}

//Swipe gesture selector function
@objc func didSwipeRight(gesture: UIGestureRecognizer) {
        // Add animation here
        DispatchQueue.main.async(execute: {
            let animation = CATransition()
            animation.type = kCATransitionReveal
            animation.subtype = kCATransitionFromLeft
            animation.duration = 0.5
            animation.delegate = self
            animation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
            //Add this animation to your view
            self.transparentView.layer.add(animation, forKey: nil)
            self.transparentView.removeFromSuperview()//Remove or hide yourview if requirement.
        })
}

Если вы хотите удалить жест из представления, используйте этот код

self.transparentView.removeGestureRecognizer(gesture)

Ex:

func willMoveFromView(view: UIView) {
    if view.gestureRecognizers != nil {
        for gesture in view.gestureRecognizers! {
            //view.removeGestureRecognizer(gesture)//This will remove all gestures including tap etc...
            if let recognizer = gesture as? UISwipeGestureRecognizer {
                //view.removeGestureRecognizer(recognizer)//This will remove all swipe gestures
                if recognizer.direction == .left {//Especially for left swipe
                    view.removeGestureRecognizer(recognizer)
                }
            }
        }
    }
}

Вызовите эту функцию как

//Remove swipe gesture
self.willMoveFromView(view: self.transparentView)

Таким образом вы можете написать оставшиеся направления и, пожалуйста, будьте осторожны, есть ли у вас режим прокрутки или нет снизу вверх и наоборот

Если у вас есть режим прокрутки, вы получите конфликт для сверху вниз и обратный просмотр жестов.

UISwipeGestureRecognizer имеет свойство direction, которое имеет следующее определение:

var direction: UISwipeGestureRecognizerDirection

Допустимое направление смахивания для этого распознавателя жестов.

Проблема со Swift 3.0.1 (и ниже) в том, что даже если UISwipeGestureRecognizerDirection соответствует _5 _ следующий фрагмент будет скомпилирован, но не даст ожидаемого положительного результата:

// This compiles but does not work
let gesture = UISwipeGestureRecognizer(target: self, action: #selector(gestureHandler))
gesture.direction = [.right, .left, .up, .down]
self.addGestureRecognizer(gesture)

В качестве обходного пути вам нужно будет создать UISwipeGestureRecognizer для каждого желаемого direction.

Следующий код игровой площадки показывает, как реализовать несколько UISwipeGestureRecognizer для одного и того же UIView и того же selector с помощью метода map массива:

import UIKit
import PlaygroundSupport

class SwipeableView: UIView {
    convenience init() {
        self.init(frame: CGRect(x: 100, y: 100, width: 100, height: 100))
        backgroundColor = .red

        [UISwipeGestureRecognizerDirection.right, .left, .up, .down].map({
            let gesture = UISwipeGestureRecognizer(target: self, action: #selector(gestureHandler))
            gesture.direction = $0
            self.addGestureRecognizer(gesture)
        })
    }

    func gestureHandler(sender: UISwipeGestureRecognizer) {
        switch sender.direction {
        case [.left]:   frame.origin.x -= 10
        case [.right]:  frame.origin.x += 10
        case [.up]:     frame.origin.y -= 10
        case [.down]:   frame.origin.y += 10
        default:        break
        }
    }
}

class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        view.backgroundColor = .white
        view.addSubview(SwipeableView())
    }
}

let controller = ViewController()
PlaygroundPage.current.liveView = controller

Жест смахивания в Swift 5

  override func viewDidLoad() {
    super.viewDidLoad()
    let swipeLeft = UISwipeGestureRecognizer(target: self, action: #selector(handleGesture))
    swipeLeft.direction = .left
    self.view!.addGestureRecognizer(swipeLeft)

    let swipeRight = UISwipeGestureRecognizer(target: self, action: #selector(handleGesture))
    swipeRight.direction = .right
    self.view!.addGestureRecognizer(swipeRight)

    let swipeUp = UISwipeGestureRecognizer(target: self, action: #selector(handleGesture))
    swipeUp.direction = .up
    self.view!.addGestureRecognizer(swipeUp)

    let swipeDown = UISwipeGestureRecognizer(target: self, action: #selector(handleGesture))
    swipeDown.direction = .down
    self.view!.addGestureRecognizer(swipeDown)
}

@objc func handleGesture(gesture: UISwipeGestureRecognizer) -> Void {
    if gesture.direction == UISwipeGestureRecognizer.Direction.right {
        print("Swipe Right")
    }
    else if gesture.direction == UISwipeGestureRecognizer.Direction.left {
        print("Swipe Left")
    }
    else if gesture.direction == UISwipeGestureRecognizer.Direction.up {
        print("Swipe Up")
    }
    else if gesture.direction == UISwipeGestureRecognizer.Direction.down {
        print("Swipe Down")
    }
}

Проведите пальцем по экрану до нужного вам представления или полного представления viewcontroller в Swift 5 и XCode 11 на основе @Alexandre Cassagne

override func viewDidLoad() {
    super.viewDidLoad()

    addSwipe()
}

func addSwipe() {
    let directions: [UISwipeGestureRecognizer.Direction] = [.right, .left, .up, .down]
    for direction in directions {
        let gesture = UISwipeGestureRecognizer(target: self, action: #selector(handleSwipe))
        gesture.direction = direction
        self.myView.addGestureRecognizer(gesture)// self.view
    }
}

@objc func handleSwipe(sender: UISwipeGestureRecognizer) {
    let direction = sender.direction
    switch direction {
        case .right:
            print("Gesture direction: Right")
        case .left:
            print("Gesture direction: Left")
        case .up:
            print("Gesture direction: Up")
        case .down:
            print("Gesture direction: Down")
        default:
            print("Unrecognized Gesture Direction")
    }
}

Сначала создайте baseViewController и добавьте viewDidLoad этот код "swift4":

class BaseViewController: UIViewController {             

     override func viewDidLoad() {
         super.viewDidLoad()
         let swipeRight = UISwipeGestureRecognizer(target: self, action: #selector(swiped))
         swipeRight.direction = UISwipeGestureRecognizerDirection.right
         self.view.addGestureRecognizer(swipeRight)
         let swipeLeft = UISwipeGestureRecognizer(target: self, action: #selector(swiped))
         swipeLeft.direction = UISwipeGestureRecognizerDirection.left
         self.view.addGestureRecognizer(swipeLeft)
     }

     // Example Tabbar 5 pages
     @objc func swiped(_ gesture: UISwipeGestureRecognizer) {
         if gesture.direction == .left {
            if (self.tabBarController?.selectedIndex)! < 5 {
                self.tabBarController?.selectedIndex += 1
            }
         } else if gesture.direction == .right {
             if (self.tabBarController?.selectedIndex)! > 0 {
                 self.tabBarController?.selectedIndex -= 1
             }
         }
     }  
}

И используйте этот baseController класс:

class YourViewController: BaseViewController {
    // its done. Swipe successful
    //Now you can use all the Controller you have created without writing any code.    
}

В Swift 5

let swipeGesture = UISwipeGestureRecognizer(target: self, action: #selector(handleSwipe))
swipeGesture.direction = [.left, .right, .up, .down]
view.addGestureRecognizer(swipeGesture)

Покопавшись немного:

Самый короткий способ добавления свайпов для всех 4 направлений:

override func viewDidLoad() {
    super.viewDidLoad()    
    for direction in [UISwipeGestureRecognizer.Direction.down, .up, .left, .right]{
        let swipeGest = UISwipeGestureRecognizer(target: self, action: #selector(swipeAction(_:)))
        swipeGest.direction = direction
        self.view.addGestureRecognizer(swipeGest)
    }
} 

@objc func swipeAction(_ gesture: UISwipeGestureRecognizer){
    switch gesture.direction {
    case UISwipeGestureRecognizer.Direction.right:
        print("Swiped right")
    case UISwipeGestureRecognizer.Direction.down:
        print("Swiped down")
    case UISwipeGestureRecognizer.Direction.left:
        print("Swiped left")
    case UISwipeGestureRecognizer.Direction.up:
        print("Swiped up")
    default: break
}

Просто более крутой быстрый синтаксис для ответа Нейта:

[UISwipeGestureRecognizerDirection.right,
 UISwipeGestureRecognizerDirection.left,
 UISwipeGestureRecognizerDirection.up,
 UISwipeGestureRecognizerDirection.down].forEach({ direction in
    let swipe = UISwipeGestureRecognizer(target: self, action: #selector(self.respondToSwipeGesture))
    swipe.direction = direction
    self.view.addGestureRecognizer(swipe)
 })

Легкий. Просто следуйте приведенному ниже коду и наслаждайтесь.

//SwipeGestureMethodUsing
func SwipeGestureMethodUsing ()
{
    //AddSwipeGesture
    [UISwipeGestureRecognizerDirection.right,
     UISwipeGestureRecognizerDirection.left,
     UISwipeGestureRecognizerDirection.up,
     UISwipeGestureRecognizerDirection.down].forEach({ direction in
        let swipe = UISwipeGestureRecognizer(target: self, action: #selector(self.respondToSwipeGesture))
        swipe.direction = direction
        window?.addGestureRecognizer(swipe)
     })
}

//respondToSwipeGesture
func respondToSwipeGesture(gesture: UIGestureRecognizer) {

    if let swipeGesture = gesture as? UISwipeGestureRecognizer
    {
        switch swipeGesture.direction
        {
        case UISwipeGestureRecognizerDirection.right:
            print("Swiped right")
        case UISwipeGestureRecognizerDirection.down:
            print("Swiped down")
        case UISwipeGestureRecognizerDirection.left:
            print("Swiped left")
        case UISwipeGestureRecognizerDirection.up:
            print("Swiped up")
        default:
            break
        }
    }
}

Это можно сделать, просто объявив одну функцию, которая будет обрабатывать все ваши направления UISwipeGestureRecognizer. Вот мой код:

let swipeGestureRight = UISwipeGestureRecognizer(target: self, action:#selector(ViewController.respondToSwipeGesture(_:)) )
swipeGestureRight.direction = UISwipeGestureRecognizerDirection.right
self.view .addGestureRecognizer(swipeGestureRight)

let swipeGestureLeft = UISwipeGestureRecognizer(target: self, action: #selector(ViewController.respondToSwipeGesture(_:)))
swipeGestureLeft.direction = UISwipeGestureRecognizerDirection.left
self.view.addGestureRecognizer(swipeGestureLeft)

let swipeGestureUp = UISwipeGestureRecognizer(target: self, action: #selector(ViewController.respondToSwipeGesture(_:)))
swipeGestureUp.direction = UISwipeGestureRecognizerDirection.up
self.view.addGestureRecognizer(swipeGestureUp)

let swipeGestureDown = UISwipeGestureRecognizer(target: self, action: #selector(ViewController.respondToSwipeGesture(_:)))
swipeGestureDown.direction = UISwipeGestureRecognizerDirection.down
self.view.addGestureRecognizer(swipeGestureDown)

Вот функция, которая будет обрабатывать функциональность смахивания:

func respondToSwipeGesture(_ sender: UIGestureRecognizer) {
    if let swipeGesture = sender as? UISwipeGestureRecognizer {
        switch swipeGesture.direction {
            case UISwipeGestureRecognizerDirection.right:
                print("right swipe")
            case UISwipeGestureRecognizerDirection.left:
                print("leftSwipe")
            case UISwipeGestureRecognizerDirection.up:
                print("upSwipe")
            case UISwipeGestureRecognizerDirection.down:
                print("downSwipe")
            default:
                break
        }
    }
}

Вот так: (Swift 4.2.1)

UISwipeGestureRecognizer.Direction.init(
  rawValue: UISwipeGestureRecognizer.Direction.left.rawValue |
            UISwipeGestureRecognizer.Direction.right.rawValue |
            UISwipeGestureRecognizer.Direction.up.rawValue |
            UISwipeGestureRecognizer.Direction.down.rawValue
)

Для Swift 5 он обновлен

//Add in ViewDidLoad
let gesture = UISwipeGestureRecognizer(target: self, action: #selector(ViewController.handleSwipe))
        gesture.direction = .right
        self.view.addGestureRecognizer(gesture)

//Add New Method
@objc func handleSwipe(sender: UISwipeGestureRecognizer) {
        print("swipe direction is",sender.direction)

    }