ios Swift：长按手势识别器 - 检测点击和长按

Swift: Long Press Gesture Recognizer - Detect taps and Long Press

提问by blue_zinc

I want to wire an action such that if the gesture is a tap, it does animates an object in a particular way but if the press duration was more than .5 secs it does something else.

我想连接一个动作，如果手势是点击，它会以特定的方式为对象设置动画，但如果按下持续时间超过 0.5 秒，它会做其他事情。

Right now, I just have the animation hooked up. I don't know how I can differentiate between a long press and a tap? How do I access the press duration to achieve the above?

现在，我只是连接了动画。我不知道如何区分长按和轻按？如何访问新闻持续时间以实现上述目标？

 @IBAction func tapOrHold(sender: AnyObject) {
        UIView.animateKeyframesWithDuration(duration, delay: delay, options: options, animations: {

            UIView.addKeyframeWithRelativeStartTime(0, relativeDuration: 0, animations: {

                self.polyRotate.transform = CGAffineTransformMakeRotation(1/3 * CGFloat(M_PI * 2))
            })
            UIView.addKeyframeWithRelativeStartTime(0, relativeDuration: 0, animations: {
                self.polyRotate.transform = CGAffineTransformMakeRotation(2/3 * CGFloat(M_PI * 2))
            })
            UIView.addKeyframeWithRelativeStartTime(0, relativeDuration: 0, animations: {
                self.polyRotate.transform = CGAffineTransformMakeRotation(3/3 * CGFloat(M_PI * 2))
            })

            }, completion: { (Bool) in
                let vc : AnyObject! = self.storyboard?.instantiateViewControllerWithIdentifier("NextView")
                self.showViewController(vc as UIViewController, sender: vc)
        })

回答by rakeshbs

Define two IBActionsand set one Gesture Recognizerto each of them. This way you can perform two different actions for each gesture.

定义两个IBActions并Gesture Recognizer为每个设置一个。通过这种方式，您可以为每个手势执行两个不同的操作。

You can set each Gesture Recognizerto different IBActions in the interface builder.

您可以Gesture Recognizer在界面构建器中将每个设置为不同的 IBAction。

@IBAction func tapped(sender: UITapGestureRecognizer)
{
    println("tapped")
    //Your animation code.
}

@IBAction func longPressed(sender: UILongPressGestureRecognizer)
{
    println("longpressed")
    //Different code
}

Through code without interface builder

通过没有界面构建器的代码

let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: "tapped:")
    self.view.addGestureRecognizer(tapGestureRecognizer)

let longPressRecognizer = UILongPressGestureRecognizer(target: self, action: "longPressed:")
    self.view.addGestureRecognizer(longPressRecognizer)

func tapped(sender: UITapGestureRecognizer)
{
    println("tapped")
}

func longPressed(sender: UILongPressGestureRecognizer)
{
    println("longpressed")
}

回答by Hardik Thakkar

For swift2

对于 swift2

let lpgr = UILongPressGestureRecognizer(target: self, action: #selector(handleLongPress))
lpgr.minimumPressDuration = 0.5
lpgr.delaysTouchesBegan = true
lpgr.delegate = self
self.featuredCouponColView.addGestureRecognizer(lpgr)

Action

行动

//MARK: - UILongPressGestureRecognizer Action -
    func handleLongPress(gestureReconizer: UILongPressGestureRecognizer) {
        if gestureReconizer.state != UIGestureRecognizerState.Ended {
            //When lognpress is start or running
        }
        else {
            //When lognpress is finish
        }
    }

For Swift 4.2/ Swift 5

对于 Swift 4.2/ Swift 5

let lpgr = UILongPressGestureRecognizer(target: self, action: #selector(handleLongPress))
lpgr.minimumPressDuration = 0.5
lpgr.delaysTouchesBegan = true
lpgr.delegate = self
self.colVw.addGestureRecognizer(lpgr)

//MARK: - UILongPressGestureRecognizer Action -
    @objc func handleLongPress(gestureReconizer: UILongPressGestureRecognizer) {
        if gestureReconizer.state != UIGestureRecognizer.State.ended {
            //When lognpress is start or running
        }
        else {
            //When lognpress is finish
        }
    }

回答by AsimRazaKhan

Through code without interface builder

通过没有界面构建器的代码

// Global variables declaration
var longPressed = false
var selectedRow = 0



override func viewDidLoad() {
        super.viewDidLoad()  
        let longPressGesture = UILongPressGestureRecognizer(target: self, action: #selector(ContactListTableViewController.handleLongPress(_:)))
        longPressGesture.minimumPressDuration = 1.0 // 1 second press
        longPressGesture.allowableMovement = 15 // 15 points
        longPressGesture.delegate = self
        self.tableView.addGestureRecognizer(longPressGesture)
    }

// Long tap work goes here !!
if (longPressed == true) {

       if(tableView.cellForRowAtIndexPath(indexPath)?.accessoryType == .Checkmark){
                tableView.cellForRowAtIndexPath(indexPath)?.accessoryType = .None
                self.selectedRow -= 1

                if(self.selectedRow == 0){
                    self.longPressed = false
                }

            } else {
                self.selectedRow += 1
                tableView.cellForRowAtIndexPath(indexPath)?.accessoryType = .Checkmark
            }

        } else if(self.selectedRow == 0) {
          // Single tape work goes here !!
        }

But the only problem is the long press gesture runs two times. If you have found any solution do comment below !

但唯一的问题是长按手势运行了两次。如果您找到任何解决方案，请在下面发表评论！