title: XCode doesn't recognize UI Class UITextChecker
body: <p>I am writing an app for my iPad running 3.2.2 with XCode 3.2.3.  It seems that the highest version of the iOS for iPad this version of XCode has is 3.2, but other apps load fine onto the phone so this doesn't seem to be an issue.  I am attempting to make use of the new UITextChecker class.  I have imported UIKit, and UITextChecker.h appears in the headers folder under the UIKit.framework icon.  However, when I try to compile this code:</p>
  
  <pre><code>NSString *theLanguage = [[UITextChecker availableLanguages] objectAtIndex:0];
  </code></pre>
  
  <p>or simply this:</p>
  
  <pre><code>UITextChecker *textChecker;
  </code></pre>
  
  <p>XCode tells me that UITextChecker is undeclared.  Any ideas what it going on here?  Thanks!</p>
  
  <p>James</p>
  
  <p>Here is a picture of the UIViewController's header file:
  <img src="https://i.stack.imgur.com/gH1R4.png" alt="alt text"></p>