- (UIView *)findFirstResponder

gistfile1.m

- (UIView *) findFirstResonder:(UIView*)root
{
  if ([root isFirstResponder]) {        
    return root;     
  }
 
  for (UIView *subView in root.subviews) {
    UIView *firstResponder = [self findFirstResonder:subView];
    if (firstResponder != nil) {
      return firstResponder;
    }
  }
  return nil;
}