我需要使用滑动来识别向下然后向右滑动手势。但是在快速的UISwipeGestureRecognizer上预先确定了正确的方向..而且我不知道如何使用其他方向...
你需要为每个方向都有一个UISwipeGestureRecognizer。这有点奇怪，因为UISwipeGestureRecognizer.direction属性是一个选项风格的位掩码，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，并将其排序，或将它们发送给不同的处理程序。这是一个实现：
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
}
}
}
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
}
}
}
可以通过简单地声明一个能够处理所有滑动UISwipeGestureRecognizer方向的功能来完成。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)
这是将涉及swipeirection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
}
}
}
简单。只需按照下面的代码享受。
//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
}
}
}
就像那样:( Swift 4.2.1）
UISwipeGestureRecognizer.Direction.init(
rawValue: UISwipeGestureRecognizer.Direction.left.rawValue |
UISwipeGestureRecognizer.Direction.right.rawValue |
UISwipeGestureRecognizer.Direction.up.rawValue |
UISwipeGestureRecognizer.Direction.down.rawValue
)
我只是想做出贡献，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)
}
从故事板：
从你的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")
}
看起来事情最近发生了变化。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上以及9.2上的实际设备上进行了测试。
或者，使用mlcollard的方便扩展here：
let swipeGesture = UISwipeGestureRecognizer() {
print("Gesture recognized !")
}
swipeGesture.direction = [.Down, .Up]
self.view.addGestureRecognizer(swipeGesture)
Apple Swift 3.1版 - Xcode版本8.3（8E162）
从Alexandre Cassagne's approach方便的方式
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")
}
}
在Swift 4.2和Xcode 9.4.1中
将动画委托，CAAnimationDelegate添加到您的班级
//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)
}
}
}
}
}
像这样调用这个函数
//Remove swipe gesture
self.willMoveFromView(view: self.transparentView)
像这样你可以写下剩余的方向，请注意你是否有从下到上的滚动视图，反之亦然
如果您有滚动视图，则从上到下会出现冲突，反之亦然。
UISwipeGestureRecognizer有一个direction属性，其定义如下：
var direction: UISwipeGestureRecognizerDirection
此手势识别器的滑动允许方向。
Swift 3.0.1（及以下版本）的问题在于，即使UISwipeGestureRecognizerDirection符合OptionSet，下面的代码片段也会编译但不会产生任何正的预期结果：
// 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，您将必须为每个所需的UISwipeGestureRecognizer创建一个direction。
以下Playground代码显示了如何使用Array的UISwipeGestureRecognizer方法为相同的UIView和相同的selector实现几个map：
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
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)
})
首先创建一个baseViewController并添加viewDidLoad此代码“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
}
}
}
}
并使用这个baseController类：
class YourViewController: BaseViewController {
// its done. Swipe successful
//Now you can use all the Controller you have created without writing any code.
}