下面程序編譯沒有錯誤，運行卻未達到想要的效果，最后調試發現，是信號槽綁定后無效，即槽函數沒有受到信號的觸發。具體代碼如下：
main.cpp

#include <QtCore> #include "controller.h" #include "mythread.h"int main(int argc,char*argv[]) {QCoreApplication app(argc,argv);Controller controler;controler.startThread();return app.exec(); }

controller.h

#ifndef CONTROLLER_H #define CONTROLLER_H#include <QObject> #include <QThread>class mythread;class Controller : public QObject {Q_OBJECT public:explicit Controller(QObject *parent = nullptr);void startThread();void stopThread();signals:void threadStopped();void threadStarted();void threadHasStopped(); public slots:void slot_dealThreadStarted();void slot_timeout();// void slot_threadStopped();// void slot_threadHasStopped(); private:QThread thread;mythread *workThread; };#endif // CONTROLLER_H

controller.cpp

#include "controller.h" #include "mythread.h" #include <QDebug> #include <QTimer>Controller::Controller(QObject *parent) : QObject(parent) {}void Controller::startThread() {workThread = new mythread;workThread->moveToThread(&thread);connect(&thread,&QThread::finished,workThread,&mythread::deleteLater);connect(this,&Controller::threadStarted,this,&Controller::slot_dealThreadStarted);connect(this,&Controller::threadStopped,workThread,&mythread::slot_threadStopped,Qt::BlockingQueuedConnection);connect(this,&Controller::threadHasStopped,workThread,&mythread::slot_threadHasStopped,Qt::BlockingQueuedConnection); // connect(this,&Controller::threadHasStopped,this,&Controller::slot_threadHasStopped); // connect(this,&Controller::threadStopped,this,&Controller::slot_threadStopped);thread.start();emit threadStarted();QTimer *timer = new QTimer;connect(timer,&QTimer::timeout,this,&slot_timeout); // QTimer timer; // connect(&timer,&QTimer::timeout,this,&slot_timeout);timer->start(5000); }void Controller::stopThread() {if(thread.isRunning()){thread.quit();thread.wait();emit threadStopped(); // timer->stop();qDebug()<<"線程被關閉！";return ;}emit threadHasStopped(); }void Controller::slot_dealThreadStarted() {qDebug()<<tr("線程開始執行"); }void Controller::slot_timeout() {qDebug()<<tr("5s之后：");stopThread(); }//void Controller::slot_threadStopped() //{ // qDebug()<<tr("線程退出！"); //}//void Controller::slot_threadHasStopped() //{ // qDebug()<<tr("線程已經執行完畢!"); //}

myThread.h

#ifndef MYTHREAD_H #define MYTHREAD_H#include <QObject>class mythread : public QObject {Q_OBJECT public:explicit mythread(QObject *parent = nullptr);public slots:void slot_threadStopped();void slot_threadHasStopped();}; #endif // MYTHREAD_H

myThread.cpp

#include "mythread.h" #include <QDebug>mythread::mythread(QObject *parent) : QObject(parent) {}void mythread::slot_threadStopped() {qDebug()<<tr("線程退出！"); }void mythread::slot_threadHasStopped() {qDebug()<<tr("線程已經執行完畢!"); }

其中信號槽綁定文本中，下面這兩個信號槽綁定沒有實現想要的效果，似乎是信號槽無效。考慮到槽函數與信號不是在同一個線程中，所以在信號槽綁定無效的情況下，設置了第五個參數，但依舊沒有達到效果。

connect(this,&Controller::threadStopped,workThread,&mythread::slot_threadStopped,Qt::BlockingQueuedConnection);
connect(this,&Controller::threadHasStopped,workThread,&mythread::slot_threadHasStopped,Qt::BlockingQueuedConnection);

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