项目场景：

多线程执行一些耗时操作，并且需要固定时间去轮询。

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代码：

#include <QThread>
#include <QTimer>
#include <QtCore/QMutex>class pollingManager : public QObject {Q_OBJECTpublic:static pollingManager*getInstance() {if ( !instance ) {instance = new pollingManager();}return instance;}void startTimerThread();signals:void timeout( void );slots:void timeoutHandle( void );private:pollingManager() {}~pollingManager() {}static pollingManager*instance;class pollingTimerThread : public QThread {public:void run() override;};
};#endif // A7TIMERPOLLDEVICE_H.cpp#define POLLING_TIMER 600
pollingManager *pollingManager ::instance  = nullptr;
void pollingManager ::startTimerThread() {qDebug( "startA7TimerThread" );pollingTimerThread*thread = new A7TimerThread();thread->setObjectName( "pollingThread" );thread->start();
}void pollingManager ::pollingTimerThread::run() {QTimer timer;timer.setInterval( POLLING_TIMER);connect( &timer, &QTimer::timeout, []() {timeoutHandle();} );timer.start();exec();
}