EKEvent accept invitation

Question

How do you accept an EKEvent invitation in iOS? I know it's possible as Fantastical, Calendars 5, and other calendar apps have this functionality, but I don't see an exposed non read-only property to change the user's status in regards to an event. Any idea how to do this?

Thanks,

Answer 1

Turns out, after doing some more research, that all of these apps are just displaying the EKEventViewController. What I had mistaken as customization was actually view tints.