QTcpSocket的相关知识

QTcpSocket是针对TCP的界面，可以进行以TCP为基础的通讯协定、资料传输。各个操作阶段会发出相关的Signal。

waitForConnected() 等待链接的建立

waitForReadyRead() 等待新数据的到来

waitForBytesWritten() 等待数据写入socket

waitForDisconnected() 等待链接断开

QTcpSocket 提供的几种接收和发送数据方法

 

write ( const char *, qint64 ) : qint64
write ( const char * ) : qint64
write ( const QByteArray & ) : qint64
writeData ( const char *, qint64 ) : qint64
read ( char * data, qint64 maxSize ): qint64 
read ( qint64 maxSize ):QByteArray
readAll ():QByteArray
readLine ( char * data, qint64 maxSize ):qint64
readLine ( qint64 maxSize = 0 ):QByteArray