如何通过 QTcpSocket 发送和读取字符串行？

Question

我尝试在 foreach 循环中逐行将字符串从客户端发送到服务器：

foreach(QString s, stringlist)
   client.sendMessage(s);

但是客户端只收到第一个字符串。当我从字符串中删除“\n”时，服务器会收到一堆合并成一个大字符串的字符串。我认为添加“\n”会将数据划分为我可以用 readLine() 读取的字符串。我错过了什么？

我的客户

class cClient:public QTcpSocket
{
public:
    void sendMessage(QString text)
    {
        text = text + "\n";
        write(text.toUtf8());        
    }
};

和服务器：

class pServer:public QTcpServer
{
    Q_OBJECT
public:
    pServer()
    {
        connect(this,SIGNAL(newConnection()),SLOT(slotNewConnection()));
    }

public slots:
    void slotNewConnection()
    {
        QTcpSocket* c = nextPendingConnection();
        connect(c,SIGNAL(readyRead()),this, SLOT(readData()));
    }

    void readData()
    {
        QTcpSocket* conn = qobject_cast<QTcpSocket*>(sender());
        QString data = QString(conn->readLine());
    }
};

Answer 1

您当时可能收到不止一行，但只读了第一行。通过检查 canReadLine 阅读尽可能多的可用行。类似的东西：

void readData()
{
    QTcpSocket* conn = qobject_cast<QTcpSocket*>(sender());
    QStringList list;
    while (conn->canReadLine())
    {
        QString data = QString(conn->readLine());
        list.append(data);
    }     
}

如何通过 QTcpSocket 发送和读取字符串行？

How to send and read string lines via QTcpSocket?

qt

qtcpsocket

qtcpserver