c++ - 具有自己的 QTimer 和 QThread 的自定义类

Question

我想为机器人传感器的某些项目创建一个具有自己的 QTimer 和 QThread 的类。经过一番搜索，这就是我想出的

#include <QCoreApplication>
#include <QTimer>
#include <QThread>
#include <QObject>
#include <QDebug>


//#####################( Robot Class  )#########################3

class Robot : public QObject
{
public:
    Robot(QObject *parent = 0);
    ~Robot();

private:
    QTimer  *mQTimer;
    QThread *mQThread;

public slots:
    void update();

};

Robot::Robot(QObject *parent)
    : QObject(parent)
{
     mQTimer = new QTimer(0);
    mQThread = new QThread(this);

    mQTimer->setInterval(1);
    mQTimer->moveToThread(mQThread);

    connect(mQTimer, SIGNAL(timeout()), this, SLOT(update()));
    connect(mQThread, SIGNAL(started()), mQTimer, SLOT(start()));

   mQThread->start();
   //mQTimer->start();

}

Robot::~Robot()
{
    delete mQTimer;
    delete mQThread;
}

void Robot::update()
{
    qDebug() << "Robot is updating ...";
}

//##################( Main )###########################
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    Robot *myRobot = new Robot(0);

    return a.exec();
}

我遇到了这个错误

QObject::connect: No such slot QObject::update() in ..\untitled1\main.cpp:34
QObject::connect: No such slot QObject::update() in ..\untitled1\main.cpp:34

Answer 1

你在你的类中缺少 Q_OBJECT 宏也尽量避免这样命名方法，因为你可以将它与 Qt 方法名称混合。还要为您创建的每个类制作额外的头文件和 cpp 文件，在本例中制作 robtot.h 和 robot.cpp。

class Robot : public QObject
{
Q_OBJECT
public:
    Robot(QObject *parent = 0);
    ~Robot();
...