QRemoteObject是Qt框架中的一个模块,用于实现跨进程通信。以下是一个简单的QRemoteObject使用案例:
首先,在服务端(即提供远程对象的进程)定义一个接口类:
// MyInterface.h
#include <QObject>
class MyInterface : public QObject
{
Q_OBJECT
public:
explicit MyInterface(QObject *parent = nullptr) : QObject(parent) {}
public slots:
virtual QString sayHello(const QString &name) = 0;
};
然后,在服务端实现这个接口类并注册为远程对象:
// MyServer.cpp
#include "MyInterface.h"
#include <QCoreApplication>
#include <QDebug>
#include <QRemoteObjectHost>
#include <QLocalSocket>
class MyImplementation : public MyInterface
{
Q_OBJECT
public:
QString sayHello(const QString &name) override {
qDebug() << "Received greeting from client:" << name;
return "Hello, " + name + "!";
}
};
int main(int argc, char *argv[])
{
QCoreApplication app(argc, argv);
// 创建并注册远程对象
auto implementation = new MyImplementation();
QRemoteObjectHost host(QUrl("local:myobject"));
host.enableRemoting(implementation);
qDebug() << "Server is running...";
return app.exec();
}
在客户端(即调用远程对象的进程)使用该远程对象:
// MyClient.cpp
#include "MyInterface.h"
#include <QCoreApplication>
#include <QDebug>
#include <QRemoteObjectNode>
int main(int argc, char *argv[])
{
QCoreApplication app(argc, argv);
// 连接到远程对象
QRemoteObjectNode node;
node.connectToNode(QUrl("local:myobject"));
// 获取远程对象
auto remoteObject = node.acquire<MyInterface>();
if (remoteObject) {
// 调用远程对象的方法
QString result = remoteObject->sayHello("Alice");
qDebug() << "Received greeting from server:" << result;
} else {
qDebug() << "Failed to acquire remote object.";
}
return app.exec();
}
以上是一个简单的QRemoteObject使用案例,展示了服务端提供远程对象的过程以及客户端调用远程对象的过程。具体根据实际需求和场景进行相应的扩展和修改。
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