When VoiceOver is active, you can use a gesture or keyboard command to open Notification Center or Control Center.
Notification Center
Tap the top of the screen on your device to move the VoiceOver focus to the status bar. Swipe down with three fingers from the top of the screen to reveal Notification Center.
On your Apple Wireless Keyboard, press Option–Up Arrow to reveal Notification Center.
Control Center
Tap the top of the screen on your device to move VoiceOver focus to the status bar. Swipe up with three fingers from the bottom of the screen to reveal Control Center.
On your Apple Wireless Keyboard, press Option–Down Arrow to reveal Control Center.
Exit Notification Center or Control Center
Tap the Home button to exit either Notification Center or Control Center.