如何识别所有4个方向的滑动

131

我需要使用滑动来识别向下和向右滑动的手势。但是在快速的UISwipeGestureRecognizer上已经确定了正确的方向。而且我不知道如何将此方向用于其他方向。

ios  swift  swipe  direction  uiswipegesturerecognizer 
— 用户名
source

Answers:

324

UISwipeGestureRecognizer每个方向都需要一个。有点奇怪，因为该UISwipeGestureRecognizer.direction属性是选项样式的位掩码，但是每个识别器只能处理一个方向。您可以根据需要将它们全部发送到同一个处理程序，并在那里进行排序，或者将它们发送到不同的处理程序。这是一个实现：

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
        }
    }
}

斯威夫特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
        }
    }
}
— 内特·库克
source
“每个识别器只能处理一个方向”-事实并非如此。参见stackoverflow.com/questions/16184539/…–
— 谢尔盖·斯科布利科夫
3
“每个识别器只能处理一个方向”-具体来说，在Swift中为true，在Objective-C中为false。
— King-Wizard
13
您不必UISwipeGestureRecognizerDirection在.Downect 前面添加。只要swipeDown.direction = .Down足够就使用。只是
— 个小费
我可以尝试将同一个手势识别器对象添加到多个视图吗？
— 最多
3
如果您迅速执行@Sergey Skoblikovs的方法（通过执行swipe.direction = [.Right,.Down,.Up,.Left]），则识别器甚至都不会被调用，也许这是swift的问题，但是目前不起作用。
— Knight0fDragon 2015年
55

我只是想贡献一点，最终看起来更加优雅：

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)
}
— 亚历山大·卡萨涅
source
10
self.addGestureRecognizer(gesture)给我造成了错误 是什么解决了self.view.addGestureRecognizer(gesture);。
— ahitt6345 '16
1
@ ahitt6345我在UIView子类中使用我的代码，但是如果您在UIViewController！中，则绝对正确！
— 亚历山大·卡萨涅
1
干净，对我来说是最好的答案。
— 克里斯托弗·史密斯
22

从情节提要中：

  1. 将四个滑动手势识别器添加到视图中。
  2. 使用属性检查器中的目标方向设置每个对象。您可以选择向右，向左，向上或向下
  3. 一位一位地选择滑动手势识别器，按住Control并拖动到您的视图控制器。插入名称（让我们说leftGesture，rightGesture，upGesture和downGesture），将连接更改为：Action，然后键入：UISwipeGestureRecognizer

从您的viewController中：

@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")
}
— 用户名
source
5
通过此答案，您无需编写大量代码，但可以使用情节提要以及情节提要和代码之间的连接。如果开发人员更喜欢以这种方式工作，则此答案可能会更容易，但是如果开发人员更喜欢在编码方面进行工作，则肯定第一个答案是最好的。
— user3099333
我使用了4种滑动手势，而不是一种，很多工作量都放在情节提要中，而不是编码。
— user3099333 2015年
9

看起来事情最近变了。在XCode 7.2中，以下方法有效：

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)
}

在iOS 8.4和9.2的模拟器中以及9.2的实际设备上进行了测试。

或者，在这里使用mlcollard的便捷扩展：

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

swipeGesture.direction = [.Down, .Up]
self.view.addGestureRecognizer(swipeGesture)
— 博格丹·法卡（Bogdan Farca）
source
5
可能会调用选择器，但发送器上的方向不正确。换句话说，如果您不需要知道滑动方向，则不需要其他方法。
— 罗伯特·古梅森
不再有效。在Swift 3中，必须将上下文提供给第一个值：[UISwipeGestureRecognizerDirection.right, .left, .up, .down]
— 布伦特·浮士德
7

Apple Swift版本3.1-Xcode版本8.3（8E162）

亚历山大·卡萨涅（Alexandre Cassagne）的便捷方法

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")
    }
}
— 约翰
source
1
使用此特定版本，您需要defaults write com.apple.dt.xcode IDEPlaygroundDisableSimulatorAlternateFramebuffer -bool YES在Terminal中运行以修复某些硬件上的错误。应固定在Xcode的新版本
— 警报器
6

在Swift 4.2和Xcode 9.4.1中

将动画委托CAAnimationDelegate添加到您的课程

//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.
        })
}

如果要从视图中删除手势，请使用此代码 

self.transparentView.removeGestureRecognizer(gesture)

例如：

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)
                }
            }
        }
    }
}

像这样调用此函数

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

这样，您可以写下剩余的方向，请注意是否从下到上都有滚动视图，反之亦然

如果您具有滚动视图，则从上到下会发生冲突，反之亦然。

— 的iOS
source
4

UISwipeGestureRecognizer具有direction具有以下定义的属性：

var direction: UISwipeGestureRecognizerDirection

此手势识别器允许的滑动方向。

Swift 3.0.1（及更低版本）的问题在于，即使UISwipeGestureRecognizerDirection符合OptionSet，以下代码段也可以编译，但不会产生任何积极的预期结果：

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

解决方法是，您必须UISwipeGestureRecognizer为每个所需的创建一个direction。

下面的代码操场显示了如何实现多个UISwipeGestureRecognizer对同一UIView和相同的selector使用数组的map方法：

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
— 伊马努·佩蒂（Imanou Petit）
source
在xcode 8.3中仍然存在相同的问题-编译但无法正常工作-我只是为了左右而退UISwipeGestureRecognizerDirection(rawValue: 15)
— 约翰·约翰·
4

将手势滑动到所需的视图，或者在Swift 5和XCode 11中基于@Alexandre Cassagne的 viewcontroller整个视图

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")
    }
}
— 多奇
source
3

在Swift 5中滑动手势 

  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")
    }
}
— 利吉斯·维平（Lijith Vipin）
source
2

首先创建一个，baseViewController然后添加viewDidLoad以下代码“ 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
             }
         }
     }  
}

并使用此类baseController：

class YourViewController: BaseViewController {
    // its done. Swipe successful
    //Now you can use all the Controller you have created without writing any code.    
}
— 伊巴尔
source
1

Nate的答案只是一个更酷的快速语法：

[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)
 })
— 阿米特
source
1

简单。只需遵循以下代码，即可享受。

//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
        }
    }
}
— 普里扬克·乔丹吉亚（Priyank Jotangiya）
source
1

对于Swift 5，它已更新

//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)

    }
— 迅捷男孩
source
这如何回答OP的问题？问题是找到一种向滑动手势识别器添加多个方向的优雅方法。
— shashwat
1

经过一段时间的挖掘：

最短的方式来添加挥笔为所有4个方向是：

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
}
— 霓虹光泽
source
1

在Swift 5中 

let swipeGesture = UISwipeGestureRecognizer(target: self, action: #selector(handleSwipe))
swipeGesture.direction = [.left, .right, .up, .down]
view.addGestureRecognizer(swipeGesture)
— nitin.agam
source
0

只需声明一个函数即可完成所有UISwipeGestureRecognizer方向的操作即可完成此操作。这是我的代码：

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)

这是将提供滑动方向功能的功能：

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
        }
    }
}
— 沙克蒂
source
0

就像这样：（Swift 4.2.1）

UISwipeGestureRecognizer.Direction.init(
  rawValue: UISwipeGestureRecognizer.Direction.left.rawValue |
            UISwipeGestureRecognizer.Direction.right.rawValue |
            UISwipeGestureRecognizer.Direction.up.rawValue |
            UISwipeGestureRecognizer.Direction.down.rawValue
)
— 犹太精神
source
2
在您的代码中添加一些描述，请使其更好。
— Poul Bak
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