问题描述

一般将计算量大的处理过程单独放置到一个单独的线程处理，因此很有可能你的处理过程需要while(1)或类似的操作。也因此很有可能造成线程在处理时计算机CPU占用过高的情况。

解决办法

降低相应线程优先级

sleep

具体实现

　　　　1.创建工作线程

#include 
     
      #include 
      
       #include 
       
        #include 
        
         #include 
         
          class WorkThread : public QThread{    Q_OBJECTpublic:    explicit WorkThread(QObject *parent = 0):        QThread(parent)      ,m_bStop(false)      ,m_iTest(0)    {}    ~WorkThread()    {        wait();    }    void stop()    {        QMutexLocker Locker(&m_mutexLock);        m_bStop = true;    }protected:    void run()    {        do{            m_iTest++;            emit sigFind(QString::number(m_iTest));            sleep(10);//::sleep(10);        }while(!m_bStop);    }signals:    void sigFind(const QString &);private:    bool m_bStop;    int m_iTest;    QMutex m_mutexLock;};

　　　　2.创建工作对象

#include 
     
      #include 
      
       #include 
       
        #include 
        
         #include "workthread.hpp"class WorkObject : public QObject{    Q_OBJECTprivate:    int m_iTimerId_PrintTime;    WorkThread *m_threadWork;public:    explicit WorkObject(QObject *parent = 0):        QObject(parent)      ,m_iTimerId_PrintTime(-1)      ,m_threadWork(0)    {        //Timer        m_iTimerId_PrintTime = startTimer(1000);//print current time: yyyy-MM-dd hh:mm:ss        // WorkThread        m_threadWork = new WorkThread(this);        connect(m_threadWork,SIGNAL(sigFind(QString)),this,SLOT(slotFind(QString)));        connect(m_threadWork,SIGNAL(finished()),m_threadWork,SLOT(deleteLater()));        m_threadWork->start();    }    ~WorkObject()    {        if(m_threadWork)            m_threadWork->stop();    }protected:    void timerEvent(QTimerEvent *event)    {        if(event->timerId() == m_iTimerId_PrintTime)        {            qDebug()<

　　　　3.main.cpp

#include 
     
      #include 
      
       #include "workobject.hpp"int main(int argc, char *argv[]){    QCoreApplication a(argc, argv);    WorkObject worker;    QTimer::singleShot(10000, &a, SLOT(quit()));    return a.exec();}

　　　　4.执行结果