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iPhoneアプリのTableView表示で「unrecognized selector sent to instance」のエラーが発生する

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これはmain.storyboardでdataSourceとdelegateの接続先をViewにしてしまうと発生するエラー。
接続先をViewControllerにすることで解決。

一番左側のリストのViewController.swiftに対してではなく、画面デザインからリスト表示になっているところの上の方にあるView Controller Sceneの下のView Controllerに対してControl+ドラッグ&ドロップで接続する。

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