A Boolean value indicating whether content protection is active.
- iOS 4.0+
- tvOS 9.0+
The value of this property is
NO if data protection is enabled and the device is currently locked. The value of this property is set to
YES if the device is unlocked or if content protection is not enabled.
When the value of this property is
NO, files that were assigned the
NSFile protection key cannot be read or written by your app. The user must unlock the device before your app can access them.