Quickly enabling Do Not Disturb is a key feature of the iOS Control Center. Apple has added more flexibility over the years, with options to temporarily switch on Do Not Disturb and deactivate it automatically. Do Not Disturb can be set to disable itself after an ongoing Calendar event, when the user leaves a specific location, and more.
Do Not Disturb
Putting your phone down at night can be a hard thing to do, especially if you are constantly bombarded with messages, emails and other notifications. While Do Not Disturb silences notifications, you will still see them pop up if you are using your iPhone for something else like reading an e-book or a web page before closing your eyes for the night, and sometimes all it takes is one pesky notification to send you down a rabbit hole for the next half hour or so. iOS 12 introduces a Bedtime Mode for Do Not Disturb that will block notifications from showing while you are using your iPhone.
In iOS 12, Do Not Disturb has several useful 3D Touch shortcuts. Simply deep press on the DND icon in the Control Center to view them. You have the option to quickly set DND for one hour, until this evening, or until you leave your current location, which is perfect for the movie theater. Also, DND has access to your Calendar, so if you are in a scheduled event you will also have an option to turn on DND until the event is over. The schedule button will take you to Settings where you can make a custom schedule.
For reasons unknown, iOS 11 has changed "Do Not Disturb" to "Hide Alerts." Its function is identical, so no worries, you can still silence annoying conversation threads. Simply tap the Info button in the top right of a thread and toggle on Hide Alerts. iOS 11 is still in beta at the moment, so this change may not stay.