Home/ Questions/Q 8269355
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-08T06:11:51+00:00

So in my app, I was saving some integer keys in NSUserDefaults ,like around

  • 0

So in my app, I was saving some integer keys in NSUserDefaults,like around a minimum of 20.

Something like this but many:

NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
[prefs setInteger:1 forKey:@"game1"];
[prefs setInteger:1 forKey:@"game2"];
[prefs setInteger:1 forKey:@"game3"];

So I was just wondering, should I call:

[[NSUserDefaults standardUserDefaults] synchronize];

Everytime I save?

Because sometimes I’m experiencing an inconsistency of the integer I’m saving and have been loading either with stopping, running the app in xCode or from the Home Button.

I have read a couple of articles on a site that stated:

In iOS4, your User Defaults may not get saved when pressing the home button. Manually calling [[NSUserDefaults standardUserDefaults] synchronize] in applicationDidEnterBackground: should ensure that your User Defaults is saved correctly.

Is this true and the same in iOS5? Or are there more accurate ways, shorter ways of saving integers. Thanks for the help.

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    Apple’s documentation says this:

    “Because this method is automatically invoked at periodic intervals, use this method only if you cannot wait for the automatic synchronization (for example, if your application is about to exit) or if you want to update the user defaults to what is on disk even though you have not made any changes.”

    So, depending on the urgency of the data you are settings, you may of may not need to call synchronize. Full documentation is here.

    • 0