Using a constant NSString as the key for NSUserDefaults

Question

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 c

Answer 1

For access from other classes:

.h

extern NSString * const PolygonNumberOfSidesPrefsKey;

.m

NSString * const PolygonNumberOfSidesPrefsKey = @"PolygonNumberOfSides"

For access only inside current class:

.m

static NSString * const kPolygonNumberOfSidesPrefsKey = @"PolygonNumberOfSides"