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While in the PCL (shared code) how can I store prefs in NSUserDefaults, only for iOS?

Cdn_EuroCdn_Euro Member ✭✭✭
edited September 2018 in Xamarin.Forms

At login, I am trying to store some user preferences only for iOS, in NSUserDefaults from the PCL project. I can check for plaform with device.iOS? And do I use dependency injection to trigger the ios specific code while in PCL? If this is correct how exactly do I use dependency injection and if im wrong what is the best way to do it?

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Answers

  • LandLuLandLu Member, Xamarin Team Xamurai

    If you just want to store some simple data in PCL. you can try to use Properties Dictionary.

    //For Saving Value
Application.Current.Properties ["id "] ="123456";
Application.Current.SavePropertiesAsync ();

//For Retrieving Saved Value
if (Application.Current.Properties.ContainsKey("id"))
{
    var id = Application.Current.Properties ["id"] as string;
    // do something with id
}

    You can also use dependency service to implement the data storage on each platform. NSUserDefaults is used on iOS, for Android try to use SharedPreferences.
    Moreover there're several libraries used for storing data for Xamarin.Forms. https://github.com/jamesmontemagno/SettingsPlugin this plugin will also be a good choice.

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