QT 传递QBytearray

在Qt中，可以使用信号槽机制来传递QByteArray。下面是一个简单的例子：

// 发送信号的类
class Sender : public QObject
{
    Q_OBJECT

public:
    Sender(QObject *parent = nullptr) : QObject(parent) {}

signals:
    void dataReady(QByteArray data);

public slots:
    void send()
    {
        QByteArray data("Hello, world!");
        emit dataReady(data);
    }
};

// 接收信号的类
class Receiver : public QObject
{
    Q_OBJECT

public:
    Receiver(QObject *parent = nullptr) : QObject(parent) {}

public slots:
    void onDataReady(QByteArray data)
    {
        qDebug() << "Received data:" << data;
    }
};

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

    Sender sender;
    Receiver receiver;

    QObject::connect(&sender, &Sender::dataReady, &receiver, &Receiver::onDataReady);

    sender.send();

    return a.exec();
}

在上面的例子中，Sender类发送了一个包含字符串"Hello, world!"的QByteArray，通过dataReady信号发送给Receiver类的onDataReady槽函数，最终在控制台输出"Received data: Hello, world!"