參見:E:\svnroot\20190408_KDM201_D02P_V1R3\30-Client\D02PDW\source\cu.cpp
connect(this, SIGNAL(signalShowError(u32, std::string)), this, SLOT(ShowError(u32, std::string)), Qt::BlockingQueuedConnection);//不同線程
osp線程發送信號到界面主線程。
Qt::BlockingQueuedConnection
https://blog.csdn.net/luotuo44/article/details/39395025
