Getting an NSString from an NSCFString

Question

I read around S.O and did Google this a fair bit but I wasn't able to find an answer to my problem...

I have an NSDictionary which is returning NSCFString's and what I need is an NSString so that I can use its doubleValue function. I can't for the life of me figure out how to turn my NSCFString's into NSStrings. I've tried the following with no success:

NSString* lng_coord = (NSString*)[dict objectForKey:key];
            if ([lng_coord class] == [NSString class])
                NSLog(@"lng coord is an exact match with NSString class");
            else {
                NSLog(@"lng coord doesn't match NSString class");
                NSLog(@"The class of lng_coord is %@", [[dict objectForKey:key] class]);
            }
            NSLog(@"%@", lng_coord);
            [CelebsAnnotation setLongitude:[lng_coord doubleValue]];

And this is the output from console:

lng coord doesn't match NSString class
The class of lng_coord is NSCFString
49.2796758

possible duplicate of [Obj C NSString returning class NSCFString](http://stackoverflow.com/questions/393873/obj-c-nsstring-returning-class-nscfstring) — PengOne, Jun 29 '11 at 06:02

score 12 · Accepted Answer · answered Jun 29 '11 at 05:59

12

NSCFString is a private subclass of NSString, you can just use it as one.

Because of such patterns like class clusters, you shouldn't directly compare the classes here - use -isKindOfClass: instead:

if ([lng_coord isKindOfClass:[NSString class]]) {
    // ...

answered Jun 29 '11 at 05:59

Georg Fritzsche

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@11684: Any more details? Have you checked that you are actually dealing with NSCFStrings? – Georg Fritzsche Jun 26 '12 at 17:28

Getting an NSString from an NSCFString

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