iOS simulator出现问题，提示：
An error was encountered while running (Domain = FBSOpenApplicationErrorDomain, Code = 4)
解决方案：
[iOS Simulator] >>> [Rest Contents and Settings...] >>> [Reset]
参考：解决问题
解决方案：An error was encountered while running(Domain=FBSOpenApplicationErrorDomain, Code=4)
原文：http://www.cnblogs.com/Milo-CTO/p/4218043.html
