如何打印Qt中的枚举所对应的字符串

比如，想获得socket的状态枚举文字，

代码如下：

    QMetaObject mo=QAbstractSocket::staticMetaObject;
    int index=mo.indexOfEnumerator(QString("SocketState").toLatin1().data());
    QMetaEnum socketStatusEnum = mo.enumerator(index);
    qDebug()<<socketStatusEnum.keyCount();
    for (int i=0; i<socketStatusEnum.keyCount(); ++i)
    {
        qDebug()<<socketStatusEnum.key(i);
    }

输出为：

Starting F:\exercise\build-untitled19-Desktop_Qt_5_4_0_MinGW_32bit-Debug\debug\untitled19.exe...
7
UnconnectedState
HostLookupState
ConnectingState
ConnectedState
BoundState
ListeningState
ClosingState

当想要输出当前socket的状态的时候，可以看下面代码

QTcpSocket *socket=new QTcpSocket;
    QAbstractSocket::SocketState socketState=socket->state();

    const QMetaObject & mo = QAbstractSocket::staticMetaObject;
    QMetaEnum me = mo.enumerator(mo.indexOfEnumerator("SocketState"));
    qDebug()<<me.valueToKey(socketState);

输出为

Starting F:\exercise\build-untitled10-Desktop_Qt_5_4_0_MinGW_32bit-Debug\debug\untitled10.exe...
UnconnectedState

转自：http://blog.csdn.net/u012199908/article/details/50325571