Question

I’m having trouble storing and retrieving a float in NSUserDefauts. I store the value, but when I retrieve it, it returns 0.

here’s what I tried and didn’t work:

[pref setFloat:3.0f forKey:@"key"];
float value = [pref floatForKey:@"key"]; //value=0

[pref setFloat:3 forKey:@"key"];
float value = [pref floatForKey:@"key"];//value=0

[pref setObject:[NSNumber numberWithFloat:3] forKey:@"key"];
float value = [[pref objectForKey:@"key"]floatValue];//value=0

[pref setObject:[NSNumber numberWithFloat:3.0f] forKey:@"key"];
float value = [[pref objectForKey:@"key"]floatValue];//value=0

What am I doing wrong here? I’ve tried these 4 pieces of code but they all return zero when retrieving the float from NSUserDefaults.

Any help is appreciated.
Thanks!

Answer 1

The first example in your code is fine, assuming that this line:

NSUserDefaults *pref = [NSUserDefaults standardUserDefaults];

Appears before it. As I suggested in my comment, the behaviour you are seeing suggests that pref is nil.