title: Markup feature in images in swift
body: <p>I've created a chat app, where user can chat and share images. Now I need to add feature where user can edit and perform some annotation on images. I've heard from iOS 9 there's a new feature called markup to perform editting on images. I've checked <code>UIActivityViewController</code> and couldn't find in it. Is this feature available and can it fit to my requirement? If not, is there any other alternatives that I can approach?</p>