Is it possible to save and load data on Today Extension using NSUserDefaults? After closing the Notification Center, the widget behaves like an app which is terminated, so a
You need to use app group identifier instead of com.* For instance:
NSUserDefaults *shared = [[NSUserDefaults alloc]initWithSuiteName:@"group.company.appgroup"];
Don't forget to synchronise when you store data
[shared synchronize];