10 Reply (without Opening Messages)
It’s only mildly inconvenient to stop whatever you’re doing to open Messages and tap out a reply. But in iOS 11, the process is simpler — and you don’t even have to open the Messages app.
When you get a Messages notification, just tap on it and pull down. This will bring up a quick reply pane where you can rapidly tap out a response. When you’re done, just tap send.