title: How to initialize an NSObject's subclass on iPhone?
body: <p>I want to write some methods in a class so that other classes can call these methods  using <code>[instance methodName:Parameter]</code>.</p>
  
  <p>If the class is a subclass of <code>UIViewController</code>, I can use <code>initWithNibName</code> to initialize it. But I want to write the methods in an <strong>NSObject's</strong> subclass, how can I initialize it?</p>