报错：Failed to instantiate the default view controller for UIMainStoryboardFile ‘MainStoryboard‘ - perhaps the designated entry point is not set?
原因分析：在StoryBoard中没有一个view controller设置了Initial Scene。
解决方案：在Storyboard中，选择一个view conroller作为story board的第一启动界面
IOS 错误：Failed to instantiate the default view controller for UIMainStoryboardFile
原文：http://www.cnblogs.com/yuyu-2012/p/4699591.html