Objective-c: NSString to enum

Question

So, I\'ve got this definition:

typedef enum {
    red = 1,
    blue = 2,
    white = 3
} car_colors;

Then, I\'ve got a variable of type car_col

Answer 1

// ...
typedef enum {
    One = 0,
    Two,
    Three
} GFN;
// ...
#define kGFNPrefix @"GFNEnum_"
// ...
+ (NSString *)gfnToStr:(GFN)gfn {
    return [NSString stringWithFormat:@"%@%d", kGFNPrefix, gfn];
}

+ (GFN)gfnFromStr:(NSString *)str {
    NSString *gfnStr = [str stringByReplacingOccurrencesOfString:kGFNPrefix withString:@""];
    return [gfnStr intValue];
}
// ...

My choice =)