Qt主线程与次线程通信实例代码

#include "dialog.h" #include "ui_dialog.h" #include<QMessageBox> Dialog::Dialog(QWidget *parent) : QDialog(parent), ui(new Ui::Dialog) { ui->setupUi(this); progressThread=new Thread(this); connect(progressThread,SIGNAL(updateValue(int)),this,SLOT(updateProgressBar(int))); connect(progressThread,SIGNAL(finished()),this,SLOT(updatePushButton())); } void Dialog::updateProgressBar(int value) { ui->progressBar->setValue(value); } void Dialog::updatePushButton() { ui->pushButton->setText("Start"); QMessageBox::information(this,"Test progress","Game is over!"); } void Dialog::startProgress() { if(progressThread->isRunning()) { progressThread->stop(); progressThread->begin=false; ui->pushButton->setText("Start"); } else { progressThread->start(); progressThread->begin=true; ui->pushButton->setText("Stop"); } } Dialog::~Dialog() { delete ui; delete progressThread; }