4方向すべてのスワイプを認識する方法

Question

下にスワイプジェスチャーを認識するには、スワイプを使用する必要があります。しかし、Swift UISwipeGestureRecognizerには、事前に決定された正しい方向があります。

Answer 1

方向ごとに1つのUISwipeGestureRecognizerが必要です。 UISwipeGestureRecognizer.directionプロパティはオプション形式のビットマスクですが、各認識エンジンは一方向しか処理できないため、少し奇妙です。必要に応じて、それらをすべて同じハンドラーに送信し、そこでソートするか、別のハンドラーに送信できます。 1つの実装を次に示します。

override func viewDidLoad() {
    super.viewDidLoad()

    var swipeRight = UISwipeGestureRecognizer(target: self, action: "respondToSwipeGesture:")
    swipeRight.direction = UISwipeGestureRecognizerDirection.Right
    self.view.addGestureRecognizer(swipeRight)

    var swipeDown = UISwipeGestureRecognizer(target: self, action: "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
        }
    }
}

スウィフト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
        }
    }
}

Answer 2

私はこれを貢献したいと思っただけで、最終的にはよりエレガントに見えます：

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)
}

Answer 3

ストーリーボードから：

1. ビューに4つのスワイプジェスチャ認識機能を追加します。
2. 属性インスペクターからのターゲット方向でそれぞれを設定します。右、左、上または下を選択できます
3. 1つずつ、スワイプジェスチャーレコグナイザーを選択し、コントロール+ビューコントローラーにドラッグします。名前を挿入し（leftGesture、rightGesture、upGesture、downGestureと言いましょう）、接続を次のように変更します：アクションとタイプ：UISwipeGestureRecognizer

あなたのviewControllerから：

@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")
}  

Answer 4

物事は最近変更されたように見えます。 XCode 7.2では、次のアプローチが機能します。

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)
}

IOS 8.4および9.2のシミュレーター、および9.2の実際のデバイスでテスト済み。

または、mlcollardの便利な拡張機能 here を使用します。

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

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

Answer 5

Apple Swiftバージョン3.1-Xcodeバージョン8.3（8E162）

Alexandre Cassagneのアプローチ からの便利な方法

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")
    }
}

Answer 6

Swift 4.2およびXcode 9.4.1

アニメーションデリゲート、CAAnimationDelegateをクラスに追加します

//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.
        })
}

ビューからジェスチャーを削除する場合は、このコードを使用します

self.transparentView.removeGestureRecognizer(gesture)

例：

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)
                }
            }
        }
    }
}

この関数を次のように呼び出します

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

このように、残りの方向を書くことができますスクロールビューがあるかどうか、下から上へ、またはその逆

スクロールビューがある場合、上から下にconflictが表示され、逆のジェスチャーが表示されます。

Answer 7

UISwipeGestureRecognizerには、次の定義を持つ direction プロパティがあります。

var direction: UISwipeGestureRecognizerDirection

このジェスチャ認識エンジンのスワイプの許可された方向。

---

Swift 3.0.1（およびそれ以降）の問題は、UISwipeGestureRecognizerDirectionが OptionSet に準拠している場合でも、次のスニペットはコンパイルされますが、期待どおりの結果が得られないことです。

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

回避策として、必要なUISwipeGestureRecognizerごとにdirectionを作成する必要があります。

---

次のPlaygroundコードは、配列のUISwipeGestureRecognizerメソッドを使用して、同じUIViewと同じselectorに対して複数のmapを実装する方法を示しています。

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

Answer 8

Swift 5の場合、更新されます

//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)

    }

Answer 9

最初にbaseViewControllerを作成し、viewDidLoadにこのコード「Swift4」を追加します。

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
             }
         }
     }  
}

そして、このbaseControllerクラスを使用します。

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

Answer 10

ネイトの答えのための単なるクーラーSwift構文：

[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)
 })

Answer 11

UISwipeGestureRecognizerのすべてのスワイプ方向を処理する1つの関数を宣言するだけで実行できます。ここに私のコードがあります：

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)

スワイプ方向機能を提供する関数は次のとおりです。

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
        }
    }
}

Answer 12

簡単です。以下のコードに従って、楽しんでください。

//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
        }
    }
}

Answer 13

スワイプジェスチャー in スウィフト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")
    }
}

Answer 14

そのように：（Swift 4.2.1）

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