Progrmatically switch iPhone's auto-answer option

Hi. i'm developing an iOS Phone Call app for enterprise release.

iPhone has auto-answer option when you have an incoming phone call. i want to progrmatically control auto-answer option in my Objective-c( or Swift ) code. is there any API to set iPhone's auto-answer option excluding jail-breaks?

and i wonder if this auto-answer controlling is an invasion of privacy.