警告: Scene is unreachable due to lack of entry points and does not have an identifier for runtime acc

现象：编译出现 

Scene is unreachable due to lack of entry points and does not have an identifier for runtime
access

原因：有些场景无法到达，或者在程序中动态访问Scene，需要给其设置一个Storyboard ID

解决方法：

1、找到落单的场景，需要就连接到界面体系中，不需要就删除

2、

为特定场景设置一个Storyboard ID即可



参考资料：http://blog.csdn.net/freedom2028/article/details/8589375