iOS桌游追踪应用TextView代理触发Segue重复执行问题排查

你的问题根源在于textViewShouldBeginEditing代理方法可能被UIKit多次调用（比如系统内部状态更新、快速重复点击等场景），导致performSegue被执行多次。下面提供两种更优雅的解决方案，比时间判断的临时方法更可靠：

方法一：添加执行标记防止重复触发 #

通过一个布尔变量标记Segue是否正在执行，避免重复调用。

步骤1：添加实例变量 #

在你的AddMatchViewController中添加一个私有变量：

private var isSegueInProgress = false

步骤2：修改代理方法 #

更新textViewShouldBeginEditing，先检查标记再执行Segue：

func textViewShouldBeginEditing(_ textView: UITextView) -> Bool {
    // 如果Segue正在执行，直接返回false
    guard !isSegueInProgress else { return false }
    
    isSegueInProgress = true
    
    // 原来的SegueKey赋值逻辑
    if textView == playersNameView { segueKey = "all" }
    else if textView == winnersNameView { segueKey = "winners" }
    else if textView == loosersNameView { segueKey = "loosers" }
    
    // 执行Segue的逻辑
    if textView == pointsView {
        performSegue(withIdentifier: "addPoints", sender: self)
    } else if [playersNameView, winnersNameView, loosersNameView].contains(textView) {
        performSegue(withIdentifier: "choosePlayers", sender: self)
    }
    
    return false
}

步骤3：重置标记 #

当从子页面返回时，重置标记以允许再次触发Segue，在viewWillAppear中添加：

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
    isSegueInProgress = false
}

方法二：用Tap手势替代代理方法（推荐） #

直接给TextView添加点击手势，完全避开代理方法的不确定性，逻辑更可控。

步骤1：添加Tap手势 #

在viewDidLoad中给每个需要触发Segue的TextView添加手势：

override func viewDidLoad() {
    super.viewDidLoad()
    
    // 为playersNameView添加点击手势
    let playersTap = UITapGestureRecognizer(target: self, action: #selector(handlePlayersTap))
    playersNameView.addGestureRecognizer(playersTap)
    playersNameView.isUserInteractionEnabled = true
    
    // 为winnersNameView添加点击手势
    let winnersTap = UITapGestureRecognizer(target: self, action: #selector(handleWinnersTap))
    winnersNameView.addGestureRecognizer(winnersTap)
    winnersNameView.isUserInteractionEnabled = true
    
    // 为loosersNameView添加点击手势
    let loosersTap = UITapGestureRecognizer(target: self, action: #selector(handleLoosersTap))
    loosersNameView.addGestureRecognizer(loosersTap)
    loosersNameView.isUserInteractionEnabled = true
    
    // 为pointsView添加点击手势
    let pointsTap = UITapGestureRecognizer(target: self, action: #selector(handlePointsTap))
    pointsView.addGestureRecognizer(pointsTap)
    pointsView.isUserInteractionEnabled = true
}

步骤2：实现手势响应方法 #

添加对应的Selector方法处理点击事件：

@objc private func handlePlayersTap() {
    segueKey = "all"
    performSegue(withIdentifier: "choosePlayers", sender: self)
}

@objc private func handleWinnersTap() {
    segueKey = "winners"
    performSegue(withIdentifier: "choosePlayers", sender: self)
}

@objc private func handleLoosersTap() {
    segueKey = "loosers"
    performSegue(withIdentifier: "choosePlayers", sender: self)
}

@objc private func handlePointsTap() {
    performSegue(withIdentifier: "addPoints", sender: self)
}

步骤3：移除代理方法 #

现在可以删除textViewShouldBeginEditing代理方法了，因为所有触发逻辑都由Tap手势接管。

两种方法对比 #

• 方法一：改动小，适合快速修复现有代码，保留代理方法的逻辑结构。
• 方法二：更彻底，完全避免了UIKit代理方法的潜在多次调用问题，代码逻辑更清晰，推荐作为长期解决方案。

内容的提问来源于stack exchange，提问作者Przemysław Szafulski