Segfault when retrieving info from QSettings

[wysota]

You have null pointers and the singleton will eliminate that. Take a look at this:

class Settings : public QSettings {
public:
  Settings *instance() {
    static Settings *m_instance = new Settings;
    return m_instance;
  }
  //..
protected:
  Settings() : QSettings(qApp){}
};
 
void someClass::someMethod(){
  int v = Settings::instance()->value("param", 7).toInt();
}

class Settings : public QSettings {
public:
  Settings *instance() {
    static Settings *m_instance = new Settings;
    return m_instance;
  }
  //..
protected:
  Settings() : QSettings(qApp){}
};

void someClass::someMethod(){
  int v = Settings::instance()->value("param", 7).toInt();
}

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