iOS 7 introduces to new convenient features that can now be accessed from the lock screen by default: The improved Notification Centre and the new Control Centre. These features give you quick and easy access to your pending notifications along with weather, calendar appointments, reminders, traffic information, as well as a new flashlight feature alongside the clock, calculator and camera apps. If you normally use a passcode to lock your iOS device, you may be concerned at the amount of information and number of features that can be accessed from here, but the good news is that you can turn almost all of it off entirely.
The Notification Center and Control Center sections in your iOS Settings app provide toggles to disable access to these features when your device is locked. Control Center provides a simple on/off toggle for disabling the feature entirely from the lock screen, while Notification Center allows you to individually restrict access to the Today View, Notifications View, or both. You can also simply disable individual sections in the Notification Center, such as the Calendar Day View, although this option will hide these sections entirely, not only when your device is locked. Note that you can’t disable the camera button in the bottom right corner, however the camera app in this mode only lets you to take new pictures, it doesn’t allow access to what’s already in your photo library.
If you’re only worried about specific notifications showing up, iOS can also hide notifications from specific apps in the lock screen Notification Centre. This is done in much the same way as it was in iOS 6: simply go into Notification Center, select an app for which you don’t want notifications appearing on your lock screen, and then scroll down and switch the Show on Lock Screen option OFF. This will hide any notifications from that app on both the main lock screen and the Notification Centre when it’s accessed from the Lock Screen; these notifications will only appear when you pull down Notification Centre after unlocking your device. Certain apps such as Messages and Mail take this one step further: the Show Preview option can be toggled off to hide the detailed text of a received message.