how to use QSetting with Mac App Groups

  • Hi,

    how would I go about saving user settings on mac group container with QSetting?

    reading the documentation it seems like QSetting only save the file in one of these location:

    • $HOME/Library/Preferences/com.MySoft.Star Runner.plist
    • $HOME/Library/Preferences/com.MySoft.plist
    • /Library/Preferences/com.MySoft.Star Runner.plist
    • /Library/Preferences/com.MySoft.plist

    for a sandboxed app, it would be something like:
    ~/Library/Containers/com.MySoft.Star Runner/Data/Library/Preferences/com.MySoft.Star Runner.plist

    but for app group, it should be something like:
    ~/Library/Group Containers/(teamID).com.MySoft.Star Runner/Library/Preferences/com.MySoft.Star Runner.plist

    is it possible for QSetting to save user settings in the group container ?

    more on mac app group:

  • Lifetime Qt Champion

    Hi and welcome to devnet,

    From a quick read through the related documentation, I don't see anything related to the App Groups stating that the application settings should reside there. On the contrary, it seems to be for sharing data (which settings are not) and/or inter process communication.

    After a second read, the documentation isn't the most clear about the handling of application settings. You can share settings for apps in a group using NSUserDefaults and thats the goal of the OP which is not the same as storing application specific settings.

    [Edit: fixed information]

  • @SGaist thanks for the response,

    my situation is that I have 2 apps that I'd like to share some user defaults settings.
    in a native Mac app with Swift, we could easily achieve this by using:

    let sharedUserDefaults = UserDefaults(suiteName: "")

    which will automatically create/load plist files located under:
    ~/Library/Group Containers/

    is there any alternative that does this with Qt?

  • Looking at the docs, i found:

    enum QSettings::Scope
    This enum specifies whether settings are user-specific or shared by all users of the same system.
    QSettings::UserScope 0
    Store settings in a location specific to the current user (e.g., in the user's home directory).
    QSettings::SystemScope 1
    Store settings in a global location, so that all users on the same machine access the same set of settings.

    Not tested ...

  • Lifetime Qt Champion

    @gietal said in how to use QSetting with Mac App Groups:


    Thanks of the information. I somehow missed that one.

    After a quick verification in QSettings sources, I haven't seen anything specific for the App Group use case.

    However, what you can do is use Objective-C++ through NSUserDefaults and it init::suiteName method. Then you can use that class to manage your shared settings.

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