QtNetwork请求导致程序"finish unexpectedly"

QtNetworkRequest cause program to "finish unexpectedly"

本文关键字：finish unexpectedly 程序 请求 QtNetwork      更新时间：2023-10-16

我是C++和Qt的初学者，我正在尝试制作一个翻译程序，但它在网络请求执行时崩溃了......

错误：Oversetter.exe 以代码 255 退出

我的代码：

头文件 

#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QApplication>
...
#include <QUrl>
#include <QtNetwork/QNetworkAccessManager>
#include <QtNetwork/QNetworkRequest>
#include <QtNetwork/QNetworkReply>
#include <QtScript/QScriptEngine>
#include <QtScript/QScriptValue>
#include <QtScript/QScriptValueIterator>
class MainWindow : public QWidget
{
Q_OBJECT
public:
MainWindow();
public slots:
void getTranslation();
void onTranslationRecieved(QNetworkReply* reply);
private:
QTextEdit *te_input;
QTextEdit *te_output;
};
#endif

代码文件

void MainWindow::getTranslation()
{
te_output->setText("[Oversettelse pågår]n[Translation in progress]");
QString url = "http://translate.googleapis.com/translate_a/single?client=gtx";
...
url.append(te_input->toPlainText());
qInfo() << "url: " + url;
QNetworkAccessManager *nam;
connect(nam, SIGNAL(finished(QNetworkReply*)), this, SLOT(onTranslationRecieved(QNetworkReply*)));
nam->get(QNetworkRequest(QUrl(url)));
}
void MainWindow::onTranslationRecieved(QNetworkReply* reply)
{
QString data = (QString) reply->readAll();
te_output->setText(data);
QScriptEngine engine;
QScriptValue result = engine.evaluate(data);
QString translation = result.property("0").property("0").property("0").toString();
}

任何帮助将不胜感激：-(

首先：

行 

QNetworkAccessManager *nam;

应该是：

QNetworkAccessManager *nam = new QNetworkAccessManager(this);
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