Question

My NSUserDefaults work fine while the app is running or minimized. But if I kill the app and restart it, the object returned is null. Code:

colorDefault = [NSUserDefaults standardUserDefaults];
[colorDefault setObject:myColor2 forKey:@"fieldKey"];
NSDictionary *appDefaults = [NSDictionary dictionaryWithObjectsAndKeys:myColor2, @"fieldKey", nil];

[[NSUserDefaults standardUserDefaults] registerDefaults:appDefaults];
//[[NSUserDefaults standardUserDefaults] synchronize];

[colorDefault synchronize];

I call [[NSUserDefaults standardUserDefaults] synchronize] in my applicationDidEnterBackground and in the applicationWillTerminate, with no success. I NSLogged both of those methods, and when I kill the app, I notice only the DidEnterBackground is being called..

Thanks for ANY help!

Answer 1

Mmmm… I think your code should be simpler.

This is what I do to write NSUserDefault and to retrieve it:

// write
[[NSUserDefaults standardUserDefaults] setObject:@"aString" forKey:@"aKey"];

// read
[[NSUserDefaults standardUserDefaults] objectForKey:@"aKey"];

setObject is not the only option: setBool, setFloat, setInteger and on the other side boolForKey, floatForKey, integerForKey are good as well.

Do not forget to set Settings.bundle and aKey in your project:

<dict>
<key>Key</key>
<string>aKey</string>
<key>DefaultValue</key>
<false/>
</dict>

Hope this helps…