如何发送和读取字符串行通过QTcpSocket

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);

但是客户端只接收到第一个字符串。当我从字符串中删除"n"时，服务器接收到一堆字符串合并在一个大字符串中。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

您可能同时收到多行，但只阅读第一行。通过canReadLine检查读取尽可能多的行。像这样:

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