如何使用QEventLoop同时等待多个QNetwork应答？

#include <QCoreApplication>
#include <QNetworkAccessManager>
#include <QNetworkReply>
#include <QEventLoop>

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

    QNetworkAccessManager manager;
    QEventLoop eventLoop;

    int expectedReplies = 3; // 预期的应答数量
    int receivedReplies = 0; // 已收到的应答数量

    // 发送第一个请求
    QNetworkReply *reply1 = manager.get(QNetworkRequest(QUrl("http://example.com")));
    QObject::connect(reply1, &QNetworkReply::finished, [&]() {
        // 处理应答数据
        // ...

        receivedReplies++;

        if (receivedReplies == expectedReplies) {
            eventLoop.quit(); // 所有应答都已收到，结束事件循环
        }
    });

    // 发送第二个请求
    QNetworkReply *reply2 = manager.get(QNetworkRequest(QUrl("http://example.org")));
    QObject::connect(reply2, &QNetworkReply::finished, [&]() {
        // 处理应答数据
        // ...

        receivedReplies++;

        if (receivedReplies == expectedReplies) {
            eventLoop.quit(); // 所有应答都已收到，结束事件循环
        }
    });

    // 发送第三个请求
    QNetworkReply *reply3 = manager.get(QNetworkRequest(QUrl("http://example.net")));
    QObject::connect(reply3, &QNetworkReply::finished, [&]() {
        // 处理应答数据
        // ...

        receivedReplies++;

        if (receivedReplies == expectedReplies) {
            eventLoop.quit(); // 所有应答都已收到，结束事件循环
        }
    });

    eventLoop.exec(); // 开始事件循环的阻塞

    // 继续处理接收到的应答数据
    // ...

    return a.exec();
}