创建一个QObject类

定义QTimer、QThread对象

将QTimer 移动到 QThread内执行

class MyTimer : public QObject
{
	Q_OBJECT

public:
	MyTimer()
		: timerInterval(500)
	{
		thread = new QThread(this);
		timer = new QTimer();
	}
	~MyTimer()
	{
		if (timer->isActive())
		{
			emit stop();
		}
	}

	QTimer* timer;
	QThread* thread;

	void setInterval(int ti)
	{
		timerInterval = ti;
	}

	int timeOutCount = 0;

public slots:

	void slotTimeOut()
	{
		emit timeout();
	}

	void startTimer()
	{
		timer->moveToThread(thread);
		timer->setInterval(timerInterval);
        
        //  线程内部启动timer
		connect(thread, SIGNAL(started()), timer, SLOT(start()));
		connect(timer, &QTimer::timeout, this, &MyTimer::slotTimeOut);
		connect(this, &MyTimer::stop, timer, &QTimer::stop);

		thread->start();
	}

	void stopTimer()
	{
		emit stop();
	}

signals:

	void timeout();
	void stop();
};