swift - UITableViewRowAction - 延迟关闭动画直到确认

Question

我用谷歌搜索了两个多小时，没有发现任何有用的东西: 我有一个带有 editActions 的 tableView 。当我按下该操作时，我会显示一个包含附加信息/需要确认的警报 Controller 。

显示alertController后，editActions立即被取消。 我想等待关闭动画，直到我的 alterController 被关闭。

这是我的代码:

override func tableView(_ tableView: UITableView, editActionsForRowAt indexPath: IndexPath) -> [UITableViewRowAction]? {
    let delete = UITableViewRowAction(style: .destructive, title: "delete") { (action, indexPath) in
        let cell = tableView.cellForRow(at: indexPath) as? DocumentTableViewCell

        self.askUserForDeleteFile() { (shallDelete) in
            if shallDelete {
                self.imageDocumentHandler?.deleteDocumentOfDatabase(self.fetchedResultsController.object(at: indexPath))
            }
        }
    }

    let deselect = UITableViewRowAction(style: .normal, title: "kickout") { (action, indexPath) in
            self.folder?.removeFromDocuments(self.fetchedResultsController.object(at: indexPath))
    }

    deselect.backgroundColor = UIColor(displayP3Red: 247/255, green: 162/255, blue: 180/255, alpha: 1.0)

    return [deselect,delete]
}

func askUserForDeleteFile(completion: @escaping (Bool)->()) {
    let alertController = UIAlertController(title: "delete document?", message: nil, preferredStyle: .actionSheet)

    let deleteAction = UIAlertAction(title: "delete", style: .destructive) { (_) in
        completion(true)
    }
    let cancelAction = UIAlertAction(title: "cancel", style: .cancel) { (_) in
        completion(false)
    }

    alertController.addAction(deleteAction)
    alertController.addAction(cancelAction)

    self.present(alertController, animated: true, completion: nil)
}

Answer 1

这是 editAction 滑动删除的标准行为。但是，如果您的目标是 IOS 11 或更高版本，那么您可以使用新方法来实现您的需求。你可以做这样的事情。

func tableView(_ tableView: UITableView, trailingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {

    let delete = UIContextualAction.init(style: UIContextualAction.Style.destructive, title: "delete", handler: { (action, view, completion) in

        let cell = tableView.cellForRow(at: indexPath) as? DocumentTableViewCell

        self.askUserForDeleteFile() { (shallDelete) in
            if shallDelete {
                self.imageDocumentHandler?.deleteDocumentOfDatabase(self.fetchedResultsController.object(at: indexPath))
            }
            completion(true)
        }
    })

    let deselect = UIContextualAction.init(style: UIContextualAction.Style.normal, title: "kickout", handler: { (action, view, completion) in
         self.folder?.removeFromDocuments(self.fetchedResultsController.object(at: indexPath))
        completion(true)
    })

    let config = UISwipeActionsConfiguration(actions: [delete, deselect])
    return config
}

除非指定，否则完成将阻止动画被关闭。但是，如果您的目标是 IOS 10，您仍然需要 editAction 方法。