How to allow NSMutableDictionary to accept 'nil' values?

Question

I have this statement:

 [custData setObject: [rs stringForColumnIndex:2]  forKey: @\"email\"];

where [rs stringForColumnIndex:2] o

Answer 1

I needed to set a NSDictionary value to one that may or may not be set yet from NSUserDefaults.

What I did was wrap the values in a stringwithFormat call. Both values are not yet set so start as null. When I run without the stringwithFormat call the app crashes. So I did this and in my situation worked.

-(NSDictionary*)userDetailsDict{
NSDictionary* userDetails = @{
                              @"userLine":[NSString stringWithFormat:@"%@",[[NSUserDefaults standardUserDefaults]stringForKey:kSelectedLine] ],
                              @"userDepot":[NSString stringWithFormat:@"%@",[[NSUserDefaults standardUserDefaults]stringForKey:@"kSelected Duty Book"]]
                              };

return userDetails;
}