c++ - QNetworkAccessManager 不工作

Question

我有以下代码:

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow),
    m_networkAccessManager(new QNetworkAccessManager(this))
{
    ui->setupUi(this);

    connect(m_networkAccessManager, SIGNAL(finished(QNetworkReply*)), this, SLOT(replyForGeoCoordinates(QNetworkReply*)));
    getCoordinates();
}

void MainWindow::getCoordinates()
{
    std::string query = "http://maps.google.com/maps/api/geocode/json?address=warsaw&sensor=false&language=en";
    QNetworkRequest request(QUrl(QString::fromStdString(query)));
    m_reply = m_networkAccessManager->get(request);

    connect(m_reply, SIGNAL(finished()), this, SLOT(rep()));
    connect(m_reply, SIGNAL(error(QNetworkReply::NetworkError)), this, SLOT(slotError(QNetworkReply::NetworkError)));
    connect(m_reply, SIGNAL(readyRead()), this, SLOT(rep()));
}

并且我想向谷歌服务器发送查询并获得响应，但是当我发送请求时，上述插槽都不会调用，所以我做错了什么？如果我将该地址放入浏览器，我会得到一些数据。

Answer 1

好吧，我认为你在联系上犯了错误。它们必须在您调用 get() 函数之前声明。