使用Storyboard時出現以下警告：Scene is unreachable due to lack of entry points and does not have an identifier

使用Storyboard時出現以下警告：

warning: Unsupported Configuration: Scene is unreachable due to lack of entry points and does not have an identifier for runtime access via -instantiateViewControllerWithIdentifier:
           

這是因為使用storyboard時沒有關聯類：在Xcode右邊選項中建立storyboard與相應類的關聯，并設定storyboardID即可