variable is not a CFStringRef

Question

I have this:

partenaire_lat = 48.8160525; 
partenaire_lng = 2.3257800;

And obtain a NSString like this:

NSString *endPoint =[NSString stringWithFormat:@"%@,%@", partenaire_lat, partenaire_lng];

and after using this NSString in some context I get this stupid error:

Variable is not a CFString.

But if I create the NSString like this:

endPoint = @"48.8160525,2.3257800" it then works perfect!

For this error Variable is not a CFString I tried the following:

NSString *endPoint1 =[NSString stringWithFormat:@"%@,%@", partenaire_lat, partenaire_lng];
CFStringRef endPoint =(CFStringRef)endPoint1;

and tried to use endPoint but not working neither this way.Anyone any miraculous idea?Thx

EDIT:partenaire_lat and partenaire_lng are both NSString!!

What hypercrypt said. You haven't actually shown the line that is causing the error. — jrturton, Sep 28 '11 at 15:24
There's nothing stupid about the error - it is telling you *exactly* what is wrong. — Abizern, Sep 28 '11 at 15:56
The best bet is to believe the error message, the trick is to understand the programming error that caused the message. — zaph, Sep 28 '11 at 19:06
@george - what makes you think it was me? Also what do you mean by "woke up?" — Abizern, Sep 28 '11 at 22:37

score 3 · Accepted Answer · answered Sep 28 '11 at 15:26

You have

partenaire_lat = 48.8160525; 
partenaire_lng = 2.3257800;

You keep saying that the two variables are NSStrings but you aren't assigning NSStrings to them. You need to assign NSString objects to NSString variables - they aren't created for you automatically.

So the answers which are telling you to use formatted strings are correct. You really should be doing it like this:

partenaire_lat = [[NSString stringWithFormat:@"%f", 48.8160525] retain]; 
partenaire_lng = [[NSString stringWithFormat:@"%f", 2.3257800] retain];

Vladimir · Answer 2 · 2011-09-28T14:41:30.003

2

You code has several potential problems:

%@ format specifier expects object parameter, while it looks like you pass plain float (I may be wrong here as there's not enough context to be sure). Change format to %f to fix your problem if that's really the case:
```
NSString *endPoint1 =[NSString stringWithFormat:@"%f,%f", partenaire_lat, partenaire_lng];
```
Your endPoint1 string is autoreleased and may become invalid outside of current scope if you don't retain it. So if you try to use your variable in another method you probably should retain it.

edited Sep 28 '11 at 14:41

answered Sep 28 '11 at 14:34

Vladimir

170,431
36
387
313

%@ is the specifier for object, not NSString (http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/Strings/Articles/formatSpecifiers.html#//apple_ref/doc/uid/TP40004265-SW1) – diciu Sep 28 '11 at 14:40

score 2 · Answer 3 · answered Sep 28 '11 at 14:35

2

what are lat and lng? i'm assuming float or double..so you should use [NSString stringWithFormat:@"%f,%f", lat, lng]; (or however you want the floats to be formatted)

answered Sep 28 '11 at 14:35

Jesse Naugher

9,780
1
41
56

then it is as vladimir pointed out in his edit..it is getting autoreleased somewhere. – Jesse Naugher Sep 28 '11 at 14:51

score -1 · Answer 4 · answered Sep 28 '11 at 15:26

-1

All you need to do

NSString *latStr=[[NSNumber numberWithFloat:partenaire_lat] stringValue];
NSString *lngStr=[[NSNumber numberWithFloat:partenaire_lng] stringValue];

and do whatever you want to do with these two string :)

answered Sep 28 '11 at 15:26

Praveen-K

3,401
1
23
31

I think it's overkill to turn a `float` into an `NSNumber` just to turn it into an `NSString` when you can do it directly. – Abizern Sep 28 '11 at 15:27

variable is not a CFStringRef

4 Answers4