我想发送POST数据到使用QT的PHP页面。我的代码如下:Qt不会发送POST数据
#include <QHttp>
#include <QUrl>
#include <QString>
#include <QNetworkReply>
#include <QNetworkRequest>
#include <iostream>
#include <QNetworkAccessManager>
#include <QObject>
....
void Transmissions::Send()
{
QUrl serviceUrl = QUrl("http://192.168.1.138/postTest.php");
QByteArray postData;
QString username="user="+User.Email()+"&";
QString Passwd="password="+User.Pass();
postData.append(username);
postData.append(Passwd);
QNetworkAccessManager *networkManager = new QNetworkAccessManager(this);
QObject::connect(networkManager, SIGNAL(finished(QNetworkReply*)), this, SLOT(serviceRequestFinished(QNetworkReply*)));
networkManager->post(QNetworkRequest(serviceUrl), postData);
}
....
void serviceRequestFinished(QNetworkReply *reply)
{
QString data = reply->readAll();
cerr << data.toStdString()<<endl;
}
现在,此代码不会编译。这些都是错误的:
error: no matching function for call to ‘QNetworkAccessManager::QNetworkAccessManager(Transmissions* const)’
和
error: no matching function for call to ‘QObject::connect(QNetworkAccessManager*&, const char*, Transmissions* const, const char*)’
现在根据这个How can I POST data to a url using QNetworkAccessManager和Qt文档这里http://doc.qt.io/qt-5/qnetworkaccessmanager.html我做的一切权利。哎呀,我甚至可以复制和粘贴从QT Docs网站的代码,并获得相同的错误。我在这里错过了什么?
编辑 如果我尝试在这里How to send data back from PHP after a HTTP Post in Qt? 所示的方法后,我得到这样的:
QObject::connect: Cannot connect (null)::configurationAdded(QNetworkConfiguration) to QNetworkConfigurationManager::configurationAdded(QNetworkConfiguration)
请别人帮
EDIT2: 感谢VitaminP我的代码会编译。但现在这个问题正在发生的事情:
QObject::connect: Cannot connect (null)::configurationAdded(QNetworkConfiguration) to QNetworkConfigurationManager::configurationAdded(QNetworkConfiguration)
QObject::connect: Cannot connect (null)::configurationRemoved(QNetworkConfiguration) to QNetworkConfigurationManager::configurationRemoved(QNetworkConfiguration)
QObject::connect: Cannot connect (null)::configurationUpdateComplete() to QNetworkConfigurationManager::updateCompleted()
QObject::connect: Cannot connect (null)::onlineStateChanged(bool) to QNetworkConfigurationManager::onlineStateChanged(bool)
QObject::connect: Cannot connect (null)::configurationChanged(QNetworkConfiguration) to QNetworkConfigurationManager::configurationChanged(QNetworkConfiguration)
什么是您尝试连接的对象/方法? (null):: configurationAdded看起来像对象创建失败,或者甚至它不是MOCed(你想连接的所有对象必须扩展QObject并在类定义中有Q_OBJECT宏) – VitaminP
我认为这个问题(来自Edit2)是你的插槽不是你的'Transmissions'类的成员,它只是一个独立的函数,使你的头文件看起来像:'class Transmissions:public QObject(){slots:void configurationAdded(..) ; void configurationRemoved(...);}'etc. – docsteer
@docsteer,你的权利。我从来没有把这些放在我的头文件中。我在这里找到了一些文档doc.qt.nokia.com/stable/qnetworkconfigurationmanager.html看起来我没有我不懂信号和插槽 – CountMurphy