Question

您好我正在尝试发送HTTP GET请求并使用函数接收结果。但是我收到了这个错误：

没有用于调用'HttpNetworkRequest :: connect的匹配函数（QNetworkAccessManager *＆amp;，const char *，RequestFinishFunction＆amp;，const）字符*）'

connect函数位于此HttpNetworkRequest.cpp文件中

#include "HttpNetworkRequest.hpp"
#include <QObject>
#include <QIODevice>
#include <QDir>

#include <bb/cascades/Application>
#include <bb/cascades/QmlDocument>
#include <bb/cascades/AbstractPane>
#include <bb/cascades/XmlDataModel>
#include <RequestFinishFunction.hpp>
using namespace bb::cascades;

HttpNetworkRequest::HttpNetworkRequest(bb::cascades::Application *app)
: QObject(app)
{
QNetworkRequest networkRequest = QNetworkRequest();
networkRequest.setUrl(QUrl("http://www.blackberry.com"));
RequestFinishFunction req;
QNetworkAccessManager *networkAccessManager = new QNetworkAccessManager;
bool res =        connect(networkAccessManager,SIGNAL(finished(QNetworkReply*)),
    req,SLOT(requestFinished()));
Q_ASSERT(res);
Q_UNUSED(res);
networkAccessManager->get(networkRequest);
}

包含的RequestFinishFunction.hpp

#ifndef REQUESTFINISHFUNCTION_HPP_
#define REQUESTFINISHFUNCTION_HPP_
#include <bb/cascades/ActivityIndicator>
#include <QObject>
#include <QObject>
class RequestFinishFunction : QObject
{
public slots:
void requestFinished(QNetworkReply* reply);
};
#endif /* REQUESTFINISHFUNCTION_HPP_ */

RequestFinishFunction.cpp文件是

#include <bb/cascades/ActivityIndicator>
#include <QObject>
#include <QObject>
#include <RequestFinishFunction.hpp>
void RequestFinishFunction::requestFinished(QNetworkReply* reply)
{
    reply->deleteLater();
}

Answer 1

连接方法的语法

bool QObject :: connect（const QObject * sender，const char * signal，const QObject * receiver，const char * method，Qt :: ConnectionType type = Qt :: AutoConnection）

我们必须传递发件人和发件人的参考。接收机。

您没有发送接收器的参考。您有两种选择。

1）使用＆amp;发送req参考。连接方法调用中的运算符

替换

connect（networkAccessManager，SIGNAL（已完成（QNetworkReply *）），req，SLOT（requestFinished（）））;

与

connect（networkAccessManager，SIGNAL（已完成（QNetworkReply *）），＆amp; req，SLOT（requestFinished（）））;

或

2）将req声明为指针

替换

RequestFinishFunction req;

与

RequestFinishFunction * req;

连接功能BlackBerry-10出错

1 个答案: