Comments on: How to use NSUserDefaults to save state of switch?

By: Patty

Patty — Sat, 17 Sep 2011 17:06:40 +0000

Where in my ios code would I put these SAVE and LOAD methods… if I didn’t want to make the user hit SAVE and LOAD buttons each time?

Just ‘load on launch’ and “save on exit’.

By: Tomislav

Tomislav — Mon, 22 Aug 2011 10:44:05 +0000

Hvala

By: Anupdas

Anupdas — Tue, 29 Mar 2011 13:17:11 +0000

Thanks for the tutorial, it saved a lot of time…Kudos

By: hardik

hardik — Thu, 24 Mar 2011 11:14:29 +0000

nice example,
gr8.

thanks.

By: Mashkov Binn

Mashkov Binn — Tue, 06 Jul 2010 21:08:46 +0000

Or this::

static const NSString *kSwitchStateKey = @”stateOfSwitch”;

- (IBAction) saveState {
[NSUserDefaults standardUSerDefaults] setBool:switch.on forKey:kSwitchStateKey];
}

- (void)viewWillAppear:(BOOL)animated {
switch.on = [NSUserDefaults standardUSerDefaults] boolForKey:kSwitchStateKey];
}

By: Chris

Chris — Fri, 22 Jan 2010 03:41:02 +0000

thanks for the info. I was curious, do you know how to save the state of a UIButton? I have an app where a UIButton is disabled when a user taps it. I just need to find a way to save the state of the button for the next time the user launches the application. Any help would be great.
-Thank you

By: Mohit

Mohit — Mon, 04 Jan 2010 11:16:22 +0000

Is there is advisable to use NSUserDefaults for an application to save UserName, Email instead of Sqlite

By: Ivan Kalaica

Ivan Kalaica — Mon, 30 Mar 2009 18:37:08 +0000

Thanks for advice Sahil Desai! I have by mistake put “YES” and “NO” – I ment “ON” and “OFF”. That’s why I have decided to use a string. Just to show how to save state.

By: Sahil Desai

Sahil Desai — Mon, 30 Mar 2009 17:12:15 +0000

I actually always just use setBool:forKey: to set the values of switches, since they are already BOOL’s and it just seems unintuitive to have to slap NSStrings into the mix.

Also should be noted that there are other useful methods in NSUserDefaults:

– setBool:forKey:
– setFloat:forKey:
– setInteger:forKey:
– setObject:forKey:

All quite self explanatory (see more here: http://developer.apple.com/DOCUMENTATION/Cocoa/Reference/Foundation/Classes/NSUserDefaults_Class/Reference/Reference.html)