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

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)