| anngame |
2012-04-29 21:53 |
求解！QT,udp编程时 udpsocket-》writeDatagram出错！
就是按钮按下，向本地发送一个udp数据包。
代买如下：
cpp文件
#include <QtCore>
#include <QtNetwork/QHostAddress>
void Emit_udp::on_Button1_clicked()
{ QByteArray datagram;
QDataStream out(&datagram,
QIODevice::WriteOnly);
out.setVersion(QDataStream::Qt_4_3);
out <<"1"<<"button_one";
udpsocket->writeDatagram(datagram,QHostAddress::LocalHost,6688); ————问题就在这行！
ui->label->setText("11111~");}
。h文件
#include <QWidget>
#include <QtNetwork/QUdpSocket>
namespace Ui
{class Emit_udp;}
class Emit_udp :
public QWidget
{ Q_OBJECTpublic:
explicit Emit_udp(QWidget *parent = 0);
~Emit_udp();
private slots:
void on_Button1_clicked();
oid on_ExitButton_clicked();
private:
Ui::Emit_udp *ui;
QUdpSocket *udpsocket;
};
结果总是在 udpsocket->writeDatagram(datagram,QHostAddress::LocalHost,6688);处报错；debug/emit_udp.o:E:\QT_WS\emit_udp-build-desktop-Qt_4_8_1_for_Desktop_-_MinGW__Qt_SDK____/../emit_udp/emit_udp.cpp:25: undefined reference to `_imp___ZN12QHostAddressC1ENS_14SpecialAddressE'不知道怎么回事啊！！！是不是QHostAddress文件没包含对啊！总是报undefined reference的错啊！
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