Build成功，但就是不能在模拟器内运行。
报错信息如下：
Unable to run app in Simulator
An error was encountered while running (Domain = NSPOSIXErrorDomain, Code = 3)
文章图片
解决方案:
把模拟器换成7.1的就可以了。之前默认是8的.
【An error was encountered while running (Domain = NSPOSIXErrorDomain, Code = 3)解决方法】本文部分内容转载自http://www.v2ex.com/t/117698
