【转】Qt多线程操作界面---在QThread更新QProgressBar

#include <QApplication>#include <QThread>#include <QMainWindow>#include <QProgressBar>#include <QPushButton>class RenderThread : public QThread{ Q_OBJECTsignals: void notify(int);public: RenderThread(QObject *parent = ): QThread(parent) { }; void test() { start(HighestPriority); };protected: void run() { ; ) { msleep(); i++; emit notify(i); } };};class MainWindow : public QMainWindow{ Q_OBJECTpublic: MainWindow(QWidget *parent = ) { resize(, ); centralWidget = new QWidget(this); progressBar = new QProgressBar(centralWidget); progressBar->setGeometry(QRect(, , , )); progressBar->setValue(); pushButton = new QPushButton("test",centralWidget); pushButton->setGeometry(QRect(, , , )); 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();}