Getting nil from standardUserDefaults,.

Question

I have created a Settings.bundle for my application, and I try to read the settings by the following code:

NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
if(!defaults)
{
    NSLog("can not get default bundle");
}
NSString *usr = [NSString stringWithFormat:@"%@",[defaults stringForKey:@"username"]];
NSLog(usr);

The output in the console is (null). I have used this before and it worked. This situation happened after I upgraded to the latest xcode for iOS. I am not sure if there is any change?

Here is the screen shot from my Settings.bundle.

Answer 1

stringForKey: is returning nil.

It's returning nil because it can't find a key for "username".

It can't find a key for "username" because the key doesn't exist in the user defaults for that app.

The key doesn't exist because either (A) it never existed, for that app, or (B) it existed but it was deleted.

(A) Can happen on the device or simulator if the app gets deleted via Springboard, or if the entire device (Simulator) gets reset. Are either of those two scenarios true?

(B) Can happen if you'd done something in your code to delete the key. Can you confirm that is not the case?

Answer 2

If you switch Simulators (new or regression SDK) or run different OS versions in Simulators, any session information, including defaults, might not carry between these different Simulator runs.