ZSSUserDefaults is a replacement for NSUserDefaults when needing to save defaults for multiple users. Defaults are saved by writing a .plist file for each user.

I created this when needing to save non-private defaults for multiple users in my app.

ZSSUserDefaults *defaults = [ZSSUserDefaults standardUserDefaults];
[defaults setUser:@"my_username"];

Register defaults:

[defaults registerDefaults:@{@"option1": @(YES)}];

Save changes when you are finished setting defaults. Normally in the viewWillDisappear: method:

- (void)viewWillDisappear:(BOOL)animated {
   [super viewWillDisappear:animated];

   [[ZSSUserDefaults standardUserDefaults] synchronizeChanges];

}

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