示例 2：与动态副本直接连接

源端无需做任何更改，因为动态副本只影响请求者节点获取副本的方式。因此，我们使用例 1 中所示的源代码。

将副本生成添加到项目中。
由于副本是动态获取的，因此与例 1 不同，不需要.rep 文件。

创建远程节点并将其连接到源主机节点。

这一步的代码与例 1 相同。

QRemoteObjectNode repNode; // create remote object node
repNode.connectToNode(QUrl(QStringLiteral("local:replica"))); // connect with remote host node

获取远程源对象的副本。

在main.cpp 中，我们使用QSharedPointer 来保存远程对象的副本，然后实例化一个副本请求者对象：

#include <QCoreApplication>

#include "dynamicclient.h"

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    QSharedPointer<QRemoteObjectDynamicReplica> ptr; // shared pointer to hold replica

    QRemoteObjectNode repNode;
    repNode.connectToNode(QUrl(QStringLiteral("local:replica")));

    ptr.reset(repNode.acquireDynamic("SimpleSwitch")); // acquire replica of source from host node

    DynamicClient rswitch(ptr); // create client switch object and pass replica reference to it

    return a.exec();
}

请求者类DynamicClient 的完整声明和定义如下：

dynamicclient.h

#ifndef _DYNAMICCLIENT_H
#define _DYNAMICCLIENT_H

#include <QObject>
#include <QSharedPointer>

#include <QRemoteObjectNode>
#include <qremoteobjectdynamicreplica.h>

class DynamicClient : public QObject
{
    Q_OBJECT
public:
    DynamicClient(QSharedPointer<QRemoteObjectDynamicReplica> ptr);
    ~DynamicClient() override = default;

Q_SIGNALS:
    void echoSwitchState(bool switchState);// this signal is connected with server_slot(..) slot of source object and echoes back switch state received from source

public Q_SLOTS:
    void recSwitchState_slot(bool); // Slot to receive source state
    void initConnection_slot(); // Slot to connect signals/slot on replica initialization

private:
    bool clientSwitchState; // holds received server switch state
    QSharedPointer<QRemoteObjectDynamicReplica> reptr;// holds reference to replica
 };

#endif

dynamicclient.cpp

#include "dynamicclient.h"// 构造函数DynamicClient::DynamicClient(QSharedPointer<QRemoteObjectDynamicReplica> ptr) ： QObject(nullptr),clientSwitchState(false),reptr(ptr) {// 复制的连接信号有效，信号槽初始化已更改   QObject::connect(reptr.data(), &QRemoteObjectDynamicReplicavoid  DynamicClient::initConnection_slot() {//Connect source replica signal currStateChanged() with client' s // recSwitchState() slot to receive source's current state：    QObject::connect(reptr.data(),SIGNAL(currStateChanged(bool)), this,SLOT(recSwitchState_slot(bool)));// Connect client's echoSwitchState(..) signal with replica's// server_slot(..) to echo back received state：    QObject::connect(this,SIGNAL(echoSwitchState(bool)),reptr.data(),SLOT(server_slot(bool))); }voidDynamicClient::recSwitchState_slot(boolvalue) {// 使用副本属性从源获取 "currState"：clientSwitchState=  reptr->property("currState").toBool()；    qDebug() << "Received source state " << value << clientSwitchState;
    // Q_EMIT echoSwitchState(clientSwitchState); }

与源端示例一起运行时，输出结果与示例 1 相同。

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