在处理Qt程序异常退出时,可以使用以下方法:
try {
// 可能引发异常的代码
} catch (const std::exception& e) {
// 处理异常
qDebug() << "Exception: " << e.what();
}
QObject::connect(qApp, &QCoreApplication::aboutToQuit, [](){
qDebug() << "Application about to quit.";
});
QObject::connect(qApp, &QCoreApplication::destroyed, [](){
qDebug() << "Application destroyed.";
qApp->quit();
});
class MyApplication : public QApplication
{
Q_OBJECT
signals:
void exceptionOccurred();
public:
MyApplication(int &argc, char **argv) : QApplication(argc, argv) {}
bool notify(QObject *receiver, QEvent *event) override {
try {
return QApplication::notify(receiver, event);
} catch (const std::exception& e) {
qDebug() << "Exception: " << e.what();
emit exceptionOccurred();
return false;
}
}
};
int main(int argc, char **argv)
{
MyApplication app(argc, argv);
MainWindow mainWindow;
QObject::connect(&app, &MyApplication::exceptionOccurred, &mainWindow, &MainWindow::handleException);
mainWindow.show();
return app.exec();
}
以上是一些处理Qt程序异常退出的方法,根据具体情况选择适合的方式来处理异常。