title: NSUnknownKeyException, KVC compliance code not working
body: <p>the following piece of code which gets successfully built and also seems alright to me but doesn't work... mind that i am new to key value coding and your help will be greatly appreciated... 
  in table view delegate didSelectRowAtIndexPath: method
  here the categoriesList is a simple table with 5 entries</p>
  
  <pre><code>NSUInteger row = [indexPath row];
  NSString *rowString = [categoriesList objectAtIndex:row];
  NSString *path = [[NSBundle mainBundle] pathForResource:@"DataBase" ofType:@"plist"];
  NSDictionary *rootDict = [[NSDictionary alloc] initWithContentsOfFile:path];
  NSArray *allRootKeys = [rootDict allKeys];
  NSMutableArray *mutableArray = [[NSMutableArray alloc] init];
  for (NSString *name in allRootKeys) {
      NSInteger index = [allRootKeys indexOfObject:name];
      NSDictionary *newDict = [allRootKeys objectAtIndex:index];
      if ([newDict valueForKey:@"Class"] == rowString)
          [mutableArray addObject:[allRootKeys objectAtIndex:index]]; 
  }   
  NSArray *childControllerArray = [[NSArray alloc] initWithArray:mutableArray];
  </code></pre>
  
  <p>now i pass childControllerArray to the loadArray ivar of my next controller which gets pushed when any row is selected with the specific array and it displays the contents of that array....
  when i delete the above code and pass a simple array of objects to it , It WORKS just fine....
  PLEASE HELP</p>
  
  <p>the exception given is:</p>
  
  <blockquote>
    <p><code>Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[&lt;NSCFString 0x543eb0&gt; valueForUndefinedKey:]: this class is not key value coding-compliant for the key Class.</code> </p>
  </blockquote>