ios - 同时处理两个手势识别器

Question

问题很简单:我有一个ViewController，上面有一个GestureRecognizer:

    panGR = UIPanGestureRecognizer(target: self,
              action: #selector(handlePan(gestureRecognizer:)))
    view.addGestureRecognizer(panGR)

在此 ViewController中，我还具有一个 class WhishlistTableViewController: UITableViewController，在该代码上我具有“滑动删除”功能:

override func tableView(_ tableView: UITableView, trailingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
    let deleteAction = UIContextualAction(style: .destructive, title: "Löschen") {[weak self] _, _, completionHandler in
        self!.deleteWishDelegate?.deleteWish(indexPath)
    completionHandler(true)
    }
    deleteAction.backgroundColor = .red
    deleteAction.image = UIImage(systemName: "trash")
    let configuration = UISwipeActionsConfiguration(actions: [deleteAction])
    configuration.performsFirstActionWithFullSwipe = false
    return configuration
}

这是我的 panGR的视频: Screenvideo
这是我的 handlePan函数:

// handle swqipe down gesture
@objc private func handlePan(gestureRecognizer:UIPanGestureRecognizer) {
    // calculate the progress based on how far the user moved
    let translation = panGR.translation(in: nil)
    let progress = translation.y / 2 / view.bounds.height

  switch panGR.state {
  case .began:
    // begin the transition as normal
    self.dismissView()
    break
  case .changed:

    Hero.shared.update(progress)

  default:
    // finish or cancel the transition based on the progress and user's touch velocity
       if progress + panGR.velocity(in: nil).y / view.bounds.height > 0.3 {
        self.dismissView()
         Hero.shared.finish()
       } else {
         Hero.shared.cancel()
       }
  }
}

问题在于这两个碰撞。仅当我禁用其他 GestureRecognizer时，“刷卡删除”才有效。为什么会这样，我该如何解决呢？

Answer 1

您应该尝试一下。

class YourViewController: UIViewController, UIGestureRecognizerDelegate

在viewDidLoad中

yourGesture.delegate = self

最后

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

    // If you wish to do conditionally.
    /*if (gestureRecognizer is UIPanGestureRecognizer || gestureRecognizer is UIRotationGestureRecognizer) {
        return true
    } else {
        return false
    }*/
}