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swift - 滑动动作延迟

问题描述

我在我的应用程序中添加了滑动操作。我有 5 个按钮代表一周中的几天。当我单击一个按钮时，它会更改我的表格视图的数组和一些东西。滑动动作完全相同并且效果很好，但有时在滑动时它会冻结并在几秒钟后再次起作用。这是延迟。

override func viewDidLoad() {
    super.viewDidLoad()

    let rightSwipe = UISwipeGestureRecognizer(target: self, action: #selector(actionSwipeRight))
    rightSwipe.direction = .right

    let leftSwipe = UISwipeGestureRecognizer(target: self, action: #selector(actionSwipeLeft))
    leftSwipe.direction = .left

    view.addGestureRecognizer(rightSwipe)
    view.addGestureRecognizer(leftSwipe)
}

和刷卡码

// s'éxécute lorsque qu'un swipe vers la droite est effectué
@objc private func actionSwipeRight() {
    print("swipe right")

    switch self.selectedDayinHoraire {
        case "LUNDI" :
            return
        case "MARDI" :
            changeDay(for: "LUNDI")
        case "MERCREDI" :
           changeDay(for: "MARDI")
        case "JEUDI" :
            changeDay(for: "MERCREDI")
        case "VENDREDI" :
            changeDay(for: "JEUDI")
        default: break
    }
}

// s'éxécute lorsque qu'un swipe vers la gauche est effectué
@objc private func actionSwipeLeft() {
    print("swipe left")

    switch self.selectedDayinHoraire {
        case "LUNDI" :
           changeDay(for: "MARDI")
        case "MARDI" :
           changeDay(for: "MERCREDI")
        case "MERCREDI" :
            changeDay(for: "JEUDI")
        case "JEUDI" :
            changeDay(for: "VENDREDI")
        case "VENDREDI" :
            return
        default: break
    }
}

func changeDay(for day : String) {
    switch day {
        case "LUNDI" :
                self.menuSelectionné(btn: self.btnLundi)
                self.LabelDynamiqueJour.text = " horaire du lundi"
                self.selectedDayinHoraire = "LUNDI"
        case "MARDI" :
                self.menuSelectionné(btn: self.btnMardi)
                self.LabelDynamiqueJour.text = " horaire du Mardi"
                self.selectedDayinHoraire = "MARDI"
        case "MERCREDI" :
                self.menuSelectionné(btn: self.btnMercredi)
                self.LabelDynamiqueJour.text = " horaire du Mercredi"
                self.selectedDayinHoraire = "MERCREDI"
        case "JEUDI" :
                self.menuSelectionné(btn: self.btnJeudi)
                self.LabelDynamiqueJour.text = " horaire du Jeudi"
                self.selectedDayinHoraire = "JEUDI"
        case "VENDREDI" :
                self.menuSelectionné(btn: self.btnVendredi)
                self.LabelDynamiqueJour.text = " horaire du vendredi"
                self.selectedDayinHoraire = "VENDREDI"
        default: break
    }
    tableviewHoraire.reloadData()
}

按钮动作：

@IBAction func btnLun(_ sender: UIButton) {
    changeDay(for: "LUNDI")
}

@IBAction func btnMar(_ sender: UIButton) {
   changeDay(for: "MARDI")
}

@IBAction func btnMer(_ sender: UIButton) {
   changeDay(for: "MERCREDI")
}

@IBAction func btnJeu(_ sender: UIButton) {
   changeDay(for: "JEUDI")
}

@IBAction func btnVen(_ sender: UIButton) {
   changeDay(for: "VENDREDI")
}

你可以看到滑动动作也一样，但有时它会冻结，如果你愿意，可以自己测试，问题来自 Horaire 视图。https://github.com/CedricLnx/School-Companion

标签： swiftlatencyuiswipegesturerecognizer

解决方案

将您的 Horaire 类设置为UIGestureRecognizerDelegate.

class Horaire: ViewController, UITableViewDataSource, UITableViewDelegate, UIGestureRecognizerDelegate {

将每个 Swipe 的代理设置为 self。

    let rightSwipe = UISwipeGestureRecognizer(target: self, action: #selector(actionSwipeRight))
    rightSwipe.direction = .right
    rightSwipe.delegate = self

    let leftSwipe = UISwipeGestureRecognizer(target: self, action: #selector(actionSwipeLeft))
    leftSwipe.direction = .left
    leftSwipe.delegate = self

添加 UIGestureRecognizerDelegate 函数。

func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
    return true
}

正如Apple Docs中所解释的， shouldRecognizeSimultaneouslyWith 允许两个或多个手势同时工作。在这种情况下，它应该允许在 self.view 和 tableView 上将单次触摸注册为滑动。

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