【转】Qt多线程操作界面---在QThread更新QProgressBar-白红宇

【转】Qt多线程操作界面---在QThread更新QProgressBar

阅读量：4944 次

发布时间：2019-06-11

本文共 1800 字，大约阅读时间需要 6 分钟。

#include 
     
      #include 
      
       #include 
       
        #include 
        
         #include 
         
          class RenderThread : public QThread{        Q_OBJECTsignals:        void notify(int);public:        RenderThread(QObject *parent = 0): QThread(parent)        {        };        void test()        {                start(HighestPriority);        };protected:    void run()        {                int i =0;                while (i<101)                {                        msleep(50);                        i++;                        emit notify(i);                }        };};class MainWindow : public QMainWindow{    Q_OBJECTpublic:    MainWindow(QWidget *parent = 0)    {        resize(600, 400);        centralWidget = new QWidget(this);        progressBar = new QProgressBar(centralWidget);        progressBar->setGeometry(QRect(130, 180, 321, 23));        progressBar->setValue(0);        pushButton = new QPushButton("test",centralWidget);        pushButton->setGeometry(QRect(110, 100, 75, 23));        QObject::connect(pushButton, SIGNAL(clicked()), this, SLOT(OnClicked()));        this->setCentralWidget(centralWidget);    };    ~MainWindow(){};private:    QProgressBar *progressBar;    QPushButton *pushButton;    QWidget *centralWidget;    RenderThread render;public slots:    void OnClicked()    {        connect(&render,SIGNAL(notify(int)),this,SLOT(OnNotify(int)));        render.test();        };    void OnNotify(int i)    {        progressBar->setValue(i);        };};#include "test.moc"int main(int argc,char* argv[]){    QApplication app(argc,argv);    MainWindow window;    window.show();    return app.exec();}