Qt-報錯 QNativeSocketEngine::joinMulticastGroup() was not called in QAbstractSocket::BoundState

相關資料：

https://blog.csdn.net/xinguhong4645/article/details/99581508

https://blog.csdn.net/wg8826/article/details/80818673

 

CSDN：編寫Qt udpsocket網絡編程組播時候提示
：報錯 QNativeSocketEngine::joinMulticastGroup() was not called in QAbstractSocket::BoundState
原因：需要將端口號選擇可以復用。修改代碼如下

udpsocket->bind(QHostAddress::AnyIPv4,8888);
1
改為

//綁定
udpsocket->bind(QHostAddress::AnyIPv4,8888,QUdpSocket::ShareAddress|QUdpSocket::ReuseAddressHint);
1
2
即可。

-------------------------------------------------------------------------

QUdpSocket *revWBudp;

revWBudp = new QUdpSocket;

//綁定本地端口

revWBudp->bind(QHostAddress::AnyIPv4, multicastPort, QUdpSocket::NotShareAddress);

//加入組播組

bool result = revWBudp->joinMulticastGroup(QHostAddress(multicastIP));//這行報錯
將
QUdpSocket::NotShareAddress
改為
QUdpSocket::ShareAddress即可
結果如下：
QUdpSocket *revWBudp;

revWBudp = new QUdpSocket;

//綁定本地端口

revWBudp->bind(QHostAddress::AnyIPv4, multicastPort, QUdpSocket::ShareAddress);

//加入組播組

bool result = revWBudp->joinMulticastGroup(QHostAddress(multicastIP));