Question

I need to store a numeric parameter in NSUserDefault, this parameter must be as default 1
So i write this code :

NSNumber *one = [NSNumber numberWithInt:100];    
NSUserDefaults *def = [NSUserDefaults standardUserDefaults];

NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:
                      one,@"my-param",
                      nil];

[def registerDefaults:dict];

This parameter has a bind over a checkbox in IB so i can check that it’s correctly set and when i start my app i see checkbox with state “on”.

On the other side i must check this value programmatically so… i do something like :

NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
NSInteger my_param = [defaults integerForKey:@"my-param"];

I excepted that since the value is not set by the user this function return value that i set as default (in my case “1”) but with my surprise i found that if value has never been set by user it returns 0 … as you can understand this’s terrible 😛 because now i can’t understand if this “0” is obtained by user choice of this’s a consequence of a non-set value… how can i write code to manage this situation ?

Answer 1

To store the numeric values in NSUserDefaults you can simply directly use as follows:

To set the integer Value in NSUserDefault use as follows below:

NSInteger lInteger = 10; 

[[NSUserDefaults standardUserDefaults] setInteger:lInteger forKey:@"integerkey"];
[[NSUserDefaults standardUserDefaults] synchronize];

And to use that NSInteger value anywhere in your project use as below:

NSInteger linteger = [[NSUserDefaults standardUserDefaults] integerForKey:@”integerkey”];

And i didnt understand your question exactly, but anyhow i think this above code may help you.