1.检查 isinitial viewcontroller 选项是否选中（程序默认加载的控制器）.
2.如图，故事版中有个vc 没有任何指向，也会出现该警告。
关于storyboard Scene is unreachable due to lack of entry points and does not have an identifier for runtime access报警
原文：http://www.cnblogs.com/marysneaker/p/5343926.html
