Question

I’m trying to make life a little bit easier for me. I get a lot of values from NSDictionary, like this:

//First, make sure the object exist 
if ([myDict objectForKey: @"value"])
{
     NSString *string = [myDict objectForKey: @"value"]; 
     //Maybe do other things with the string here... 
}

I have a file (Variables.h) where I store a lot of stuff to control the app. If would be nice to put a few helper methods in there. So instead of doing the above code, I would like to have a c++ function in the Variables.h, so I can just do this:

NSString *string = GetDictValue(myDictionary, @"value"); 

How do you write that c++ method?

Thanks in advance

Answer 1

I suppose this is technically a c function, is c++ a strict requirement

static NSString* GetDictValue(NSDictionary* dict, NSString* key)
{
    if ([dict objectForKey:key])
    {
         NSString *string = [dict objectForKey:key]; 
         return string;
    }
    else 
    {
        return nil;
    }
}

Consider using id and casting where necessary:

static id GetDictValue(NSDictionary* dict, NSString* key)
{
    if ([dict objectForKey:key])
    {
         id value = [dict objectForKey:key]; 
         return value;
    }
    else 
    {
        return nil;
    }
}