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Ios 如何识别四个方向的刷卡

ios swift

Ios 如何识别四个方向的刷卡,ios,swift,swipe,direction,uiswipegesturerecognizer,Ios,Swift,Swipe,Direction,Uiswipegesturerecognizer,我需要使用滑动来识别向下然后向右滑动的手势。但在swift上，手势识别器已经预先确定了正确的方向。。我不知道如何将其用于其他方向。每个方向都需要一个UISweepGestureRecognitor。这有点奇怪，因为uisweegesturecognizer.direction属性是一个选项样式的位掩码，但每个识别器只能处理一个方向。如果需要，您可以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。下面是一个实现： override func viewDidLoad

我需要使用滑动来识别向下然后向右滑动的手势。但在swift上，手势识别器已经预先确定了正确的方向。。我不知道如何将其用于其他方向。

每个方向都需要一个
UISweepGestureRecognitor
。这有点奇怪，因为
uisweegesturecognizer.direction
属性是一个选项样式的位掩码，但每个识别器只能处理一个方向。如果需要，您可以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。下面是一个实现：

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
        }
    }
}
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
        }
    }
}
从故事板：

  • 在视图中添加四个滑动手势识别器
  • 使用属性检查器中的目标方向设置每个方向。你可以 选择右、左、上或下
  • 逐个选择滑动手势识别器，控制并拖动到视图控制器。插入名称（让我们说LeftSignature、RightSignature、UpSignature和 向下手势），将连接更改为：操作，并将类型更改为： 手势识别器
    • 从您的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")
}
    我只是想贡献这个，最后看起来更优雅：

    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)
}
    看起来最近情况有所改变。在XCode 7.2中，以下方法起作用：

    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上的模拟器上进行测试，并在9.2上的实际设备上进行测试

    或者，使用mlcollard的便捷扩展：

    UISwipeGestureRecognizer
    具有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（及以下版本）的问题在于，即使
    UISWIPgestureRecognitizerDirection
    符合，以下代码段仍将编译，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)
    作为一种解决方法，您必须为每个所需的
    方向创建
    uisweegestureerecognizer
    

    
以下代码显示了如何使用数组的
    map
    方法为相同的
    UIView
    和相同的
    selector
    实现多个
    uisweegesturecognizer
    ：
    

    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

    
Apple Swift 3.1版-Xcode 8.3版（8E162）
    
从
    

    只需声明一个函数即可完成，该函数将处理您的所有滑动UISweepGestureRecognitor方向。这是我的密码：
    

    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)

    
以下是处理swipedirection功能的函数：
    

    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
        }
    }
}

    

    对于Nate的回答，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)
 })

    

    简单。只需按照下面的代码进行操作即可享受
    

    //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
        }
    }
}

    

    在Swift 4.2和Xcode 9.4.1中
    
将动画代理，CAAnimationDelegate添加到您的类中
    

    //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：
    
像这样调用这个函数
    

    //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滚动视图，反之亦然
    

    如果您有滚动视图，您将获得从上到下的冲突，并查看相反的手势。
    首先创建
    baseViewController
    并添加
    viewDidLoad
    此代码“swift4”：
    
就像那样：（Swift 4.2.1）
    

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

    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")
    }
}

    

    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)

    }

    

    挖了一段时间后：
    
向所有四个方向添加滑动的最短路径是：
    

    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
}

    

    将手势滑动到所需的视图，或在Swift 5和XCode 11中基于
    
在Swift 5中
    

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

    

    “每个识别器只能处理一个方向”-这不是真的。请参阅“每个识别器只能处理一个方向”-具体而言，Swift中为真，Objective-C中为假。您不必在
    .Down
    前面添加
    UIWipegestureRecognizerDirection
    。如果足够的话，只需使用
    swipeDown.direction=.Down
    。只需提示=）我们可以将同一个手势识别器对象添加到多个视图中吗？我已经尝试过，但没有成功。如果您在swift中使用@Sergey Skoblikovs的方法，（通过执行
    swipe.direction=[.Right、.Down、.Up、.Left]
    ），识别器甚至不会被调用，也许这是swift的问题，但是到目前为止还不起作用。根据这个答案，你不需要写很多代码，但是你可以使用故事板以及故事板和代码之间的连接。如果开发人员更喜欢以这种方式工作，这个答案可能会更简单，但是如果开发人员更喜欢在编码方面工作，那么第一个答案肯定是最好的。我使用了4个滑动手势而不是一个，并且大量的工作负载在情节提要中而不是编码。
    self.addgestureRecognitizer（手势）
    为我造成了一个错误。修正它的是self.view.addgestureRecognitizer（手势）
    @ahitt6345我在
    UIView
    子类中使用我的代码，但是如果您在
    UIViewController
    中，那么您是绝对正确的！干净，对我来说是最好的答案。可能会调用选择器，但发送器上的方向不正确。换句话说，如果你不需要知道刷卡的方向，这种方法很好，但不需要知道其他的。不再有效。在Swift 3中，必须将上下文提供给第一个值：
    [uisweegestureRecognitizerDirection.right、.left、.up、.down]
    同样的问题仍然存在于xcode 8.3中-已编译但不起作用-我只得到了左和右返回的
    uisweegestureRecognitizerDirection（rawValue:15）
    对于此特定版本，您需要运行
    默认值write com.apple.dt.xcode ideplaygrounddisablesimulator alternateframebuffer-

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

    

      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")
    }
}

    

    //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)

    }

    

    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
}

    

    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")
    }
}

    

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