Saving user settings in ios

1- Saving user settings and loading them is very simple in ios development,

    NSUserDefaults* prefs = [NSUserDefaults standardUserDefaults];
    [prefs setValue:@"10" forKey:@"timer"];
    [prefs setValue:@"NO" forKey:@"showTip"];
    [prefs synchronize];

don't forget to syncronize at the end so settings will be saved.

2- Loading user settings,

    NSUserDefaults* prefs = [NSUserDefaults standardUserDefaults];
    NSString* s = [prefs valueForKey:@"timer"];
    combines = [(NSString*)[prefs valueForKey:@"showTip"] boolValue];
    start    = [NSDate timeIntervalSinceReferenceDate];