问Qt阻塞线程和跨线程通信

EN

//Create UI
MainWindow mainWindow;
mainWindow.show();

//set up sender thread and the `QObject` doing the actual work (Sender)
QThread senderThread;
Sender sender; //the object doing the actual sending
sender.moveToThread(&sender); //move sender to its thread
senderThread.start(); //starts the thread which will then enter the event loop

//connect UI to sender thread
QObject::connect(&mainWindow, SIGNAL(sendMessage(QString)), &sender, SLOT(sendMessage(QString)), Qt::QueuedConnection);

 ...

 const int ret = app.exec(); // enter main event loop

 `senderThread.quit();` //tell sender thread to quit its event loop
 `senderThread.wait();` //wait until senderThread is done

 `return ret;` // leave main