InteractivePopGestureRecognizer返回时自定义键盘提前弹出问题求助

方案一：监听手势状态精准控制键盘 #

手势返回是渐进式过程，仅靠进度判断容易失效，需根据手势的完整状态周期处理：

• 在聊天页面的viewDidLoad中添加手势监听：

  if let popGesture = navigationController?.interactivePopGestureRecognizer {
      popGesture.addTarget(self, action: #selector(handlePopGesture(_:)))
  }
  

• 实现手势状态处理方法：

  @objc private func handlePopGesture(_ gesture: UIGestureRecognizer) {
      switch gesture.state {
      case .began:
          // 手势启动立即隐藏键盘，避免过渡中提前弹出
          hideCustomKeyboard()
      case .ended, .cancelled, .failed:
          // 仅当手势完成且成功返回聊天页时，延迟恢复键盘
          if gesture.state == .ended && navigationController?.viewControllers.contains(self) == true {
              DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
                  self.showCustomKeyboard()
              }
          }
      default:
          break
      }
  }
  

方案二：延迟viewWillAppear中的键盘触发逻辑 #

聊天页的viewWillAppear会在手势过渡过程中提前触发，可通过标记区分是否为手势返回场景：

• 添加属性标记手势状态：

  private var isPopGestureActive = false
  

• 结合手势监听更新标记：

  if let popGesture = navigationController?.interactivePopGestureRecognizer {
      popGesture.addTarget(self, action: #selector(handlePopGesture(_:)))
  }
  

  @objc private func handlePopGesture(_ gesture: UIGestureRecognizer) {
      isPopGestureActive = gesture.state == .began || gesture.state == .changed
      
      if [.ended, .cancelled, .failed].contains(gesture.state) {
          DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
              self.isPopGestureActive = false
              if self.navigationController?.topViewController == self {
                  self.showCustomKeyboard()
              }
          }
      }
  }
  

• 修改viewWillAppear逻辑：

  override func viewWillAppear(_ animated: Bool) {
      super.viewWillAppear(animated)
      // 非手势触发的场景（如首次进入）直接弹出键盘
      if !isPopGestureActive {
          showCustomKeyboard()
      }
  }
  

方案三：通过导航代理统一控制过渡前后的键盘状态 #

借助导航控制器的生命周期钩子，在过渡开始前隐藏键盘，过渡完成后再恢复：

• 实现UINavigationControllerDelegate协议方法：

  func navigationController(_ navigationController: UINavigationController, animationControllerFor operation: UINavigationController.Operation, from fromVC: UIViewController, to toVC: UIViewController) -> UIViewControllerAnimatedTransitioning? {
      if operation == .pop {
          // 启动返回过渡时隐藏键盘
          (fromVC as? ChatViewController)?.hideCustomKeyboard()
      }
      return nil // 使用系统默认过渡动画，也可自定义
  }
  
  func navigationController(_ navigationController: UINavigationController, didShow viewController: UIViewController, animated: Bool) {
      // 过渡完成后，若回到聊天页则弹出键盘
      DispatchQueue.main.async {
          (viewController as? ChatViewController)?.showCustomKeyboard()
      }
  }
  

• 记得在聊天页或导航控制器中设置navigationController?.delegate = self

注：上述代码中的hideCustomKeyboard()和showCustomKeyboard()需替换为你项目中实际控制自定义键盘显示/隐藏的方法；0.1秒延迟是为了等待过渡动画完成，可根据实际效果调整时长。

内容的提问来源于stack exchange，提问作者daniel