Qt槽函数接受不到信息？

Question

我只是想做一个非常简单的qt关于网络的测试，读取一个网页内容作为请求，解析出其中信息，代码附上：

myHTTP.h
#pragma once
#include <QNetworkAccessManager>
#include <QNetworkRequest>
#include <QNetworkReply>
#include <QtWidgets/QMainWindow>
#include "ui_myHTTP.h"

class myHTTP : public QMainWindow
{
    Q_OBJECT

public:
    myHTTP(QWidget *parent = Q_NULLPTR);

private:
    Ui::myHTTPClass ui;
    QNetworkAccessManager *manager;
public slots:
    void  slotFinished(QNetworkReply* reply);
};

 myHTTP.cpp
 #include "myHTTP.h"
#include <QUrl>
myHTTP::myHTTP(QWidget *parent)
    : QMainWindow(parent)
{
    ui.setupUi(this);
    manager = new QNetworkAccessManager(this);
    bool b = connect(manager, SIGNAL(finished(QNetworkReply*)), this, SLOT(slotFinished((QNetworkReply*))));
    /*此处b总是为false*/
    manager->get(QNetworkRequest(QUrl("http://www.baidu.com")));  //  开启一个以百度首页的网络请求

}
void myHTTP::slotFinished(QNetworkReply* reply)
{
    QString allData = reply->readAll();
    ui.textBrowser->setText(allData);

    // 删除网络回复资源
    reply->deleteLater();
}

}

Answer 1