title: how to instantiate an object of class from string in Objective-C?
body: <p>I've a String who's value is the name of the Class[MyClass] which has to be instantiated, and MyClass has a method called</p>
  
  <pre><code> -(void)FunctionInClass;
  </code></pre>
  
  <p>i'm using the method called NSClassFromString to instantiate MyClass.I want to know </p>
  
  <pre><code>1) what does NSClassFromString return?? 
  2) what is id? 
  3) How to call method -(void)FunctioninClass which is in MyClass using the instance.
  </code></pre>
  
  <p>how should i proceed , i'm doing it in Objective-C for iPhone app?</p>