connectsocket SIGNALconnected this SLOTconnected; connectsocket SIGNALdisconnected this SLOTdisconnected; connectsocket SIGNALreadyRead this SLOTreadyRead;写成lambo形式

connect(socket, &QIODevice::connected, this, &MyClass::connected); connect(socket, &QIODevice::disconnected, this, &MyClass::disconnected); connect(socket, &QIODevice::readyRead, this, &MyClass::readyRead);