iOS 8 & Xcode 6：解决The network connection was lost.

最近，和几位大大一起，仿写一个客户端。代码没作变动，一直工作正常。刚才从休眠中继续调试，输出如下错误：

2014-11-21 21:37:02.430 zhihudaily[2140:212751] Error Domain=NSURLErrorDomain Code=-1005 "The network connection was lost." UserInfo=0x7fe86a65d8e0 {NSUnderlyingError=0x7fe86a522690 "The network connection was lost.", NSErrorFailingURLStringKey=http://news-at.zhihu.com/api/3/stories/latest?client=0, NSErrorFailingURLKey=http://news-at.zhihu.com/api/3/stories/latest?client=0, _kCFStreamErrorDomainKey=1, _kCFStreamErrorCodeKey=57, NSLocalizedDescription=The network connection was lost.}

重启模拟器，程序可正常运行。