Get the current first responder without using a private API

Question

I submitted my app a little over a week ago and got the dreaded rejection email today. It tells me that my app cannot be accepted because I\'m using a non-public API; specif

Answer 1

This is what I have in my UIViewController Category. Useful for many things, including getting first responder. Blocks are great!

- (UIView*) enumerateAllSubviewsOf: (UIView*) aView UsingBlock: (BOOL (^)( UIView* aView )) aBlock {

 for ( UIView* aSubView in aView.subviews ) {
  if( aBlock( aSubView )) {
   return aSubView;
  } else if( ! [ aSubView isKindOfClass: [ UIControl class ]] ){
   UIView* result = [ self enumerateAllSubviewsOf: aSubView UsingBlock: aBlock ];

   if( result != nil ) {
    return result;
   }
  }
 }    

 return nil;
}

- (UIView*) enumerateAllSubviewsUsingBlock: (BOOL (^)( UIView* aView )) aBlock {
 return [ self enumerateAllSubviewsOf: self.view UsingBlock: aBlock ];
}

- (UIView*) findFirstResponder {
 return [ self enumerateAllSubviewsUsingBlock:^BOOL(UIView *aView) {
  if( [ aView isFirstResponder ] ) {
   return YES;
  }

  return NO;
 }];
}