Error Domain=kCFErrorDomainCFNetwork Code=1 "(null)" UserInfo={_kCFStreamErrorCodeKey=1, _kCFStreamErrorDomainKey=12}

[Huxiaomimg]

when i used host with "tcp://www.xxx.com" port 8883, it can't connnet successful.
the error is show:
Error Domain=kCFErrorDomainCFNetwork Code=1 "(null)" UserInfo={_kCFStreamErrorCodeKey=1, _kCFStreamErrorDomainKey=12}
SDK version is 0.15.3
but it worked on 0.9.9 by host without "tcp://"