storyboard已经设置了storyboard ID还是爆这个警告

Main.storyboard: Scene is unreachable due to lack of entry points and does not have an identifier for runtime access via -instantiateViewControllerWithIdentifier:.

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在 storyboard中 勾选上is inital View Controller 这个选项 .将这个storyboard作为程序的主入口

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没有提供入口