title: I can't create an object of type MPMoviePlayerController - Unknown type
body: <p>I'm trying to create a component to play videos using MPMoviePlayerController. The problem is that it says that its an unknown type. Why is that? I've found tons of tutorials using this.</p>
  
  <p>Here's my code:</p>
  
  <pre><code>@interface HIMoviePlayer : UIViewController
  {
      MPMoviePlayerController *test;
  }
  
  -(void) playVideoWithURL: (NSString *) url;
  @end
  </code></pre>