qt - QObject::startTimer:定时器只能与以 QThread 启动的线程一起使用

Question

我试图在工作线程的事件循环中启动计时器，但收到此错误:QObject::startTimer:计时器只能与以 QThread 启动的线程一起使用

这有什么问题吗？

#include <QObject>
#include <QThread>
#include <QTimer>

class A : public QObject
{
    Q_OBJECT
public:
    A();

private:
    QThread m_workerThread;
    QTimer m_myTimer;

};

A::A()
{
    this->moveToThread(&m_workerThread);
    m_myTimer.moveToThread(&m_workerThread);
    m_workerThread.start();
    m_myTimer.start(1000);
}

Answer 1

在任何地方初始化计时器，但在线程启动时立即启动它(将其附加到 QThread::started 信号):

class A : public QObject
{
    Q_OBJECT
public:
    A();

private slots:
    void started();
    void timeout();

private:
    QThread m_workerThread;
    QTimer m_myTimer;
};

A::A()
{
    moveToThread(&m_workerThread);

    connect(&m_workerThread, SIGNAL(started()), this, SLOT(started()));
    connect(&m_myTimer, SIGNAL(timeout()), this, SLOT(timeout()));

    m_myTimer.setInterval(1000);
    m_myTimer.moveToThread(&m_workerThread);

    m_workerThread.start();
}

void A::started()
{
    timer.start();
}

void A::timeout()
{
    // timer handler
}