An error was encountered while running (Domain = FBSOpenApplicationErrorDomain, Code = 4)

iOS simulator运行程序出现问题:

An error was encountered while running (Domain = FBSOpenApplicationErrorDomain, Code = 4)

解决方案:

iOS Simulator----> Reset Contents and Settings ----> Reset

原文地址:https://www.cnblogs.com/BinZone/p/4314986.html