title: Symbol not found: kUTTypeImage
body: <p>I copied some bits of code from <a href="http://developer.apple.com/library/ios/#documentation/AudioVideo/Conceptual/CameraAndPhotoLib_TopicsForIOS/Articles/PickinganItemfromthePhotoLibrary.html" rel="noreferrer">apple's documentation</a>- and I got these 2 errors: </p>
  
  <pre><code>Undefined symbols for architecture i386:
    "_kUTTypeImage", referenced from:
        -[ImagePicker imagePickerController:didFinishPickingMediaWithInfo:] in ImagePicker.o
  ld: symbol(s) not found for architecture i386
  clang: error: linker command failed with exit code 1 (use -v to see invocation)
  </code></pre>
  
  <p>What am I doing wrong?</p>
  
  <p>EDIT:
  The code:</p>
  
  <pre><code>- (IBAction) showSavedMediaBrowser {
      [self startMediaBrowserFromViewController: self
                                  usingDelegate: (id)self];
  }
  
  - (BOOL) startMediaBrowserFromViewController: (UIViewController*) controller
                                 usingDelegate: (id &lt;UIImagePickerControllerDelegate,
                                                 UINavigationControllerDelegate&gt;) delegate {
  
      if (([UIImagePickerController isSourceTypeAvailable:
            UIImagePickerControllerSourceTypeSavedPhotosAlbum] == NO)
          || (delegate == nil)
          || (controller == nil))
          return NO;
  
      UIImagePickerController *mediaUI = [[UIImagePickerController alloc] init];
      mediaUI.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
  
      // Displays saved pictures and movies, if both are available, from the
      // Camera Roll album.
      mediaUI.mediaTypes =
      [UIImagePickerController availableMediaTypesForSourceType:
       UIImagePickerControllerSourceTypeSavedPhotosAlbum];
  
      // Hides the controls for moving &amp; scaling pictures, or for
      // trimming movies. To instead show the controls, use YES.
      mediaUI.allowsEditing = YES;
  
      mediaUI.delegate = delegate;
  
      [controller presentViewController:mediaUI animated:YES completion:nil];
      return YES;
  }
  
  - (void) imagePickerController: (UIImagePickerController *) picker
   didFinishPickingMediaWithInfo: (NSDictionary *) info {
  
      NSString *mediaType = [info objectForKey: UIImagePickerControllerMediaType];
      UIImage *originalImage, *editedImage, *imageToUse;
  
      // Handle a still image picked from a photo album
      if (CFStringCompare ((__bridge_retained CFStringRef) mediaType, kUTTypeImage, 0)
          == kCFCompareEqualTo) {
  
          editedImage = (UIImage *) [info objectForKey:
                                     UIImagePickerControllerEditedImage];
          originalImage = (UIImage *) [info objectForKey:
                                       UIImagePickerControllerOriginalImage];
  
          if (editedImage) {
              imageToUse = editedImage;
          } else {
              imageToUse = originalImage;
          }
          // Do something with imageToUse
      }
  
      [[picker parentViewController] dismissModalViewControllerAnimated: YES];
  }
  </code></pre>
  
  <p>I think the error is where the last method starts, but I'm not sure.</p>
  
  <p>Your post does not have much context to explain the code sections; please explain your scenario more clearly.</p>