With iOS 11, that option has extended to individual third-party apps, and Apple has now introduced an overarching "Show Previews" toggle for all apps installed on your iOS device.
Hiding Text Previews for All Apps on the iOS Lock Screen
- Open the Settings app.
- Tap "Notifications."
- Tap "Show Previews."
- Tap "When Unlocked."
If you choose "Never" in the same area of Show Preview settings, these notification previews won't show notification content even when the iPhone or iPad is unlocked.
The same options are also available for each individual app, allowing for more granular control over your notification privacy settings in iOS 11. If you don't want the same setting for all of your apps, visit Settings > Notifications > scroll to the desired app > and then scroll to the bottom of the app's notification page to find Show Preview settings for that specific app.
Discuss this article in our forums