xcode6新建项目，删除mainstoryboard，新建storyboard报错：failed to instantiate the default view controller for ...

xcode6新建项目，删除了原有的main.storyboard，新建了个storyboard。但是运行程序黑屏，报错为：

Failed to instantiate the default view controller for UIMainStoryboardFile 'ImageExplorer' - perhaps the designated entry point is not set?

上网搜解决办法：

解决方案：在Storyboard中，选择一个view controller作为story board的第一启动界面。

将右侧的 is initial view controller前面打勾，就可以了。

这时左边出现了剪头，原来时没有程序入口，that's all.