Convert CFStringRef to NSString

Question

I'm trying to retrieve some info from the main bundle:

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {    
    CFStringRef bundleVer = CFBundleGetValueForInfoDictionaryKey(CFBundleGetMainBundle(), kCFBundleVersionKey);
    NSString *appVersion = (__bridge NSString *)bundleVer;
}

I can get the CFStringRef (in debug I can see the proper value associate to the variable), but when I try to cast it to NSString my appVersion variable has "null" value (previously it was nil).

What am I doing wrong?

I'm using ARC.

EDIT: It seems that I have problem with my project, every NSString object can't be assigned even with a simple static assignment, the value of the test variable is (null)

NSString *test = @"";

possible duplicate of [How to convert CFStringRef to NSString?](http://stackoverflow.com/questions/640367/how-to-convert-cfstringref-to-nsstring) — Gutblender, Oct 10 '14 at 14:17
What is the value of your CFStringRef? I copied your code and it totally works on my app. — Ken Kuan, Oct 10 '14 at 14:17
The value is 34 as it is in my bundle file... after the assignment the appVersion goes from nil to (null) — Ivan, Oct 10 '14 at 20:24

score 1 · Answer 1 · answered Oct 10 '14 at 14:28

1

  CFStringRef boundleVer = CFBundleGetValueForInfoDictionaryKey(CFBundleGetMainBundle(), kCFBundleVersionKey);
  NSString *appVersion = (__bridge NSString *)(boundleVer);

Its working fien on my side,, it is returning "2"

answered Oct 10 '14 at 14:28

aBilal17

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score 0 · Answer 2 · answered Oct 10 '14 at 14:44

I would use that code instead of your current one to fetch the same information:

NSString *_shortVersion = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleShortVersionString"];

or

NSString *_version = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleVersion"];

NOTE: I'm not sure which information you need eventually from the bundle.

Convert CFStringRef to NSString

2 Answers2