QApplication :: notify not called

Question

我想捕获QApplication :: notify例程中未捕获的异常以正常关闭。但应用程序崩溃

我在Windows上使用Qt 5.6与mingw 5.3.0 x64。

任何想法我做错了什么？

#include <QApplication> 
#include <QObject> 
#include <QtDebug> 
#include <QTimer> 

class TestApplication Q_DECL_FINAL : public QApplication 
{ 

    Q_OBJECT 

public: 

    TestApplication(int &argc, char **argv) : QApplication(argc, argv) {} 
    bool notify(QObject *receiver, QEvent *event) { 

     try { 
      return QApplication::notify(receiver, event); 
     } catch(std::exception& e) { 
      qCritical() << qPrintable(QString("Exception thrown: %1").arg(e.what())); 
     } 

     return false; 

    } 

}; 

#include "main.moc" 

int main(int argc, char *argv[]) 
{ 

    TestApplication a(argc, argv); 

    QTimer timer; 
    timer.setSingleShot(true); 

    QObject::connect(&timer, &QTimer::timeout, []() { 
     throw 1; 
    }); 

    timer.start(5000); 

    return a.exec(); 

} 

Answer 1

尝试使用实际的异常对象而不是int。像'throw std :: exception（）'。适用于Qt 5.7 Mingw Win10。