Could you please explain how to use the 'Add multi UserDefault support (#1592)?

[mori1234]

The documentation mentions 'Add multi UserDefault support (#1592)' but I don't understand how to use it. Could you please provide a simple sample code?"
Let me provide a simple sample code demonstrating how to use multiple UserDefaults:

[aismann]

Each user has their own name, login, etc.
Use: void UserDefault::setFileName(std::string nameFile) {
For example: setFileName(“User1”);
Creates a UserDefaultFile: “User1UserDefault.xml

[mori1234]

    // Setting the first user default file
    UserDefault::setFileName("user1_defaults");
    UserDefault::getInstance()->setStringForKey("username", "User1");
    std::string_view user1Name = UserDefault::getInstance()->getStringForKey("username");
    MyLog("User1 name:{}", user1Name);

    // Setting the second user default file
    UserDefault::setFileName("user2_defaults");
    UserDefault::getInstance()->setStringForKey("username", "User2");
    std::string_view user2Name = UserDefault::getInstance()->getStringForKey("username");
    MyLog("User2 name:{}", user2Name);

    // Switching back to the first user default file
    UserDefault::setFileName("user1_defaults");
    std::string_view  user3Name = UserDefault::getInstance()->getStringForKey("username");
    MyLog("User1 name:{}", user3Name);

Only the user1_defaults file is created.
output
User1 name:User1
User2 name:User2
User1 name:User2

[mori1234]

    // Setting the first user default file
    UserDefault::setFileName("user1_defaults");
    UserDefault::getInstance()->setStringForKey("username", "User1");
    std::string_view user1Name = UserDefault::getInstance()->getStringForKey("username");
    MyLog("User1 name:{}", user1Name);
    UserDefault::destroyInstance();

    // Setting the second user default file
    UserDefault::setFileName("user2_defaults");
    UserDefault::getInstance()->setStringForKey("username", "User2");
    std::string_view user2Name = UserDefault::getInstance()->getStringForKey("username");
    MyLog("User2 name:{}", user2Name);
    UserDefault::destroyInstance();

    // Switching back to the first user default file
    UserDefault::setFileName("user1_defaults");
    std::string_view  user3Name = UserDefault::getInstance()->getStringForKey("username");
    MyLog("User1 name:{}", user3Name);
    UserDefault::destroyInstance();

Is this correct?

[aismann]

It works with "different" exe files:

See PR description:

help to run multi .exe file with seperate UserDefault

[rh101]

    // Setting the first user default file
    UserDefault::setFileName("user1_defaults");
    UserDefault::getInstance()->setStringForKey("username", "User1");
    std::string_view user1Name = UserDefault::getInstance()->getStringForKey("username");
    MyLog("User1 name:{}", user1Name);
    UserDefault::destroyInstance();

    // Setting the second user default file
    UserDefault::setFileName("user2_defaults");
    UserDefault::getInstance()->setStringForKey("username", "User2");
    std::string_view user2Name = UserDefault::getInstance()->getStringForKey("username");
    MyLog("User2 name:{}", user2Name);
    UserDefault::destroyInstance();

    // Switching back to the first user default file
    UserDefault::setFileName("user1_defaults");
    std::string_view  user3Name = UserDefault::getInstance()->getStringForKey("username");
    MyLog("User1 name:{}", user3Name);
    UserDefault::destroyInstance();

Is this correct?

Using UserDefault::destroyInstance(); should work. If it doesn't work, then just use the debugger, and step into the code to see what is happening.