header:
#ifndef SENDCANMSGTHREAD_H
#define SENDCANMSGTHREAD_H
#include <QThread>
#include "can/canUtils.h"
#include <QTime>
#include <iostream>
class SendCanMsgThread : public QThread{
Q_OBJECT
public:
SendCanMsgThread();
~SendCanMsgThread();
signals:
void canResponseError(SendCanMsgThread *sendCanMsgThread);
};
#endif // SENDCANMSGTHREAD_H
cpp
#include "can/sendCanMsgThread.h"
SendCanMsgThread::SendCanMsgThread(){
isRunning = true;
responsed = false;
currentRequestTimes = 0;
}
SendCanMsgThread::~SendCanMsgThread(){
std::cerr<<" ~SendCanMsgThread() "<<std::endl;
}
void SendCanMsgThread::run(){
if(1){
emit canResponseError(this);
}
}
mainWindow.cpp
void MainWindow::showPickupStautus(){
SendCanMsgThread *sendCanMsgThread = new SendCanMsgThread();
sendCanMsgThread->start();
connect(sendCanMsgThread,SIGNAL(canResponseError(SendCanMsgThread*)),this,SLOT(canResponseError(SendCanMsgThread *)));
}
//红色地方很重要，一个是指针传参的方式 二是信号和槽这只能定义参数类型，不能出现具体参数，否则提示No such signal
void MainWindow::canResponseError(SendCanMsgThread *sendCanMsgThread ){
//can通讯异常提示
std::cerr<<" canResponseError "<<std::endl;
delete sendCanMsgThread;
sendCanMsgThread = NULL;
QMessageBox msgBox;
msgBox.setText("Could not get can response " );
msgBox.exec();
}