I'm using NSUSerDefaults to store user preferences. I remember reading somewhere that setting the keys as constants is a good idea - and I agree. The following code is what I currently have:

[[NSUserDefaults standardUserDefaults]
        setObject:[NSNumber numberWithInt:polygon.numberOfSides] 
           forKey:@"polygonNumberOfSides"];

I tried changing this to:

@implementation Controller

NSString const *kPolygonNumberOfSides = @"polygonNumberOfSides";

-(void)savePolygonInfo {
    [[NSUserDefaults standardUserDefaults]
            setObject:[NSNumber numberWithInt:polygon.numberOfSides] 
               forKey:kPolygonNumberOfSides];
}

While this does work, it produces "warning: passing argument 1 of 'objectForKey:' discards qualifiers from pointer target type". I'm keen to keep my code free from compiler warnings. How can I fix this warning?

objective-c cocoa default-value
Edit
Report