qt socket

結果編譯無法通過，錯誤信息：

D:/project/server/server.cpp:5: undefined reference to `_imp___ZN10QUdpSocketC1EP7QObject'
D:/project/server/server.cpp:5: undefined reference to `_imp___ZN10QUdpSocketC1EP7QObject'
:-1: error: collect2: ld returned 1 exit status

報錯的代碼就是
udpSocket = new QUdpSocket(this);

用的windows下的qt creator

確認pro文件中是否有這麼一句
QT       += network