ios - 'InboxTableViewController' 与协议(protocol) 'UITableViewDataSource' 的冗余一致性

Question

我在 iOS 开发中有新的东西，当我构建我的项目时它向我展示了这个错误

"Redundant conformance of 'InboxTableViewController' to protocol 'UITableViewDataSource"'

这是代码

class InboxTableViewController: UITableViewController,                                UITableViewDataSource,                                UIGestureRecognizerDelegate {    private let CARD_CELL        = "CardCell"    private let VIEW_CARD_SEGUE  = "ViewCardSegue"    private let EDIT_CARD_SEGUE  = "EditCardSegue"    private let TAG_TITLE_LABEL  = 1    private let TAG_DETAIL_LABEL = 2    private let TAG_CANVAS       = 3    private let agent = RenderingAgent()    private var listeningForChangeEvents = false    var cards: ArrayList {        return DataUtility.AllCards

Answer 1

通过子类化 UITableViewController 您已经实现了 UITableViewDataSource，因此再次列出它会导致此错误。你只需要这个(那里没有 UITableViewDataSource):

class InboxTableViewController: UITableViewController, UIGestureRecognizerDelegate

可以在official docs中看到Conforms To 部分中的 UITableViewController 已经符合 UITableViewDataSource。只需将覆盖添加到您要实现的那些 UITableViewDataSource 方法，例如:

class InboxTableViewController: UITableViewController,                                UIGestureRecognizerDelegate {    private let CARD_CELL        = "CardCell"    private let VIEW_CARD_SEGUE  = "ViewCardSegue"    private let EDIT_CARD_SEGUE  = "EditCardSegue"    private let TAG_TITLE_LABEL  = 1    private let TAG_DETAIL_LABEL = 2    private let TAG_CANVAS       = 3    private let agent = RenderingAgent()    private var listeningForChangeEvents = false    var cards: ArrayList {        return DataUtility.AllCards    }    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {        // implement    }