Open Radar

 
Summary:
The "Adopting Multitasking Enhancements" guide states that "a transition from secondary to primary app is a new scenario in which your app can receive a UIScreenDidConnectNotification notification."

This is not the case - there is no notification when changing split modes, so applications cannot reliably detect when to display alternate airplay windows.

Steps to Reproduce:
1) Connect to an Airplay display
2) Start an application in slide-over mode which listens for the UIScreenDidConnectNotification notification
3) Drag the split divider so the application becomes primary/full screen

Expected Results:
UIScreenDidConnectNotification notification is received

Actual Results:
No notification is received. Combined with radar 23574610, this makes it impossible to determine whether it is safe to display different content on an Airplay display when adopting split-screen multitasking.

The notification IS received if the application is sent to the background and then re-opened.

Version:
iOS 9.0, iOS 9.0.1, iOS 9.1

Configuration:
iPad Air 2, iOS 9.0. iPad Mini 4, iOS 9.0.1. iPad Mini 4, iOS 9.1. All connected to a 2nd Generation Apple TV.