试图创建2个对象(客户端)生活在不同线程中,并用1个对象(服务器)活主线程上进行通信。但是我没有看到在服务器对象上的任何活动。该代码的主要目的是看到当2个信号从2个不同的线程来与主线程上的单个对象通信的信号时隙将如何表现。
objects.cpp:
#include "objects.h"
Objects::Objects(QObject* parent): QObject (parent)
{
}
void Objects::printData(const QString& data)
{
qDebug() << data;
}
void Objects::process(const QString& data)
{
emit sendData(data+":processed");
}
Q_NORETURN void Objects::run()
{
while (true) {
//qDebug() << "hit" << m_rate;
emit sendData("test"+QString::number(m_rate));
QThread::sleep(m_rate);
}
}
objects.h:
#ifndef OBJECTS_H
#define OBJECTS_H
#include <QObject>
#include <QDebug>
#include <QThread>
class Objects: public QObject
{
Q_OBJECT
public:
explicit Objects(QObject* parent = Q_NULLPTR);
signals:
void sendData(const QString&);
public slots:
void printData(const QString&);
void process(const QString&);
void run();
public:
ulong m_rate;
};
#endif // OBJECTS_H
main.cpp中:
#include <QCoreApplication>
#include "objects.h"
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
Objects ser;
Objects cl1;
Objects cl2;
cl1.m_rate = 1;
cl2.m_rate = 2;
QThread cl1_t;
QThread cl2_t;
QObject::connect(&cl1_t, &QThread::started, &cl1, &Objects::run);
QObject::connect(&cl2_t, &QThread::started, &cl2, &Objects::run);
QObject::connect(&cl1, &Objects::sendData, &ser, &Objects::process);
QObject::connect(&cl2, &Objects::sendData, &ser, &Objects::process);
QObject::connect(&ser, &Objects::sendData, &cl1, &Objects::printData);
QObject::connect(&ser, &Objects::sendData, &cl2, &Objects::printData);
cl1.moveToThread(&cl1_t);
cl2.moveToThread(&cl2_t);
cl1_t.start();
cl2_t.start();
return a.exec();
}
看起来你void run()
功能元件阻塞的Qt内部的事件队列。只需在您QCoreApplication::processEvents();
添加void run()
,它会解决你的问题。
void Objects::run()
{
while (true) {
qDebug() << "hit" << m_rate;
emit sendData("test" + QString::number(m_rate));
QThread::sleep(m_rate);
QCoreApplication::processEvents();
}
}
UPD:我会建议你阅读关于您的问题更详细的解释THIS维基文章。