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

【iOS开发-27】解决方案：An error was encountered while running(Domain=FBSOpenApplicationErrorDomain, Code=4)