Get the current first responder without using a private API

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; specifically, it says, The non-public API that is included in your application is firstResponder. Now, the offending API call is actually a solution I found here on SO: UIWindow *keyWindow = [[UIApplication sharedApplication] keyWindo

[mooz]

get the current first responder

[hitoriblog]

[[[UIApplication sharedApplication] keyWindow] findFirstResponder];が無敵な気がした

[watanata2000]

firstResponder resignFirstResponder

[griffin-stewie]

FirstResponder

[paella]

iPhoneでファーストレスポンダを探すのにfirstResponderメソッドを使ったらRejectされる模様。サブビューを検索するサンプルソースが載っている。