UIApplication.ProtectedDataDidBecomeAvailable Property
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Indicates that the state of protected data has changed.
[Foundation.Advice("Use UIApplication.Notifications.ObserveProtectedDataDidBecomeAvailable helper method instead.")]
[Foundation.Field("UIApplicationProtectedDataDidBecomeAvailable", "UIKit")]
public static Foundation.NSString ProtectedDataDidBecomeAvailable { get; }member this.ProtectedDataDidBecomeAvailable : Foundation.NSStringProperty Value
- Attributes
Remarks
This constant can be used with the NSNotificationCenter to register a listener for this notification. This is an NSString instead of a string, because these values can be used as tokens in some native libraries instead of being used purely for their actual string content. The 'notification' parameter to the callback contains extra information that is specific to the notification type.
If you want to subscribe to this notification, you can use the convenience UIApplication.Notifications.M:UIKit.UIKit.UIApplication.Notifications.ObserveProtectedDataDidBecomeAvailable* method which offers strongly typed access to the parameters of the notification.
The following example shows how to use the strongly typed Notifications class, to take the guesswork out of the available properties in the notification:
//
// Lambda style
//
// listening
notification = UIApplication.Notifications.ObserveProtectedDataDidBecomeAvailable ((sender, args) => {
/* Access strongly typed args */
Console.WriteLine ("Notification: {0}", args.Notification);
});
// To stop listening:
notification.Dispose ();
//
// Method style
//
NSObject notification;
void Callback (object sender, Foundation.NSNotificationEventArgs args)
{
// Access strongly typed args
Console.WriteLine ("Notification: {0}", args.Notification);
}
void Setup ()
{
notification = UIApplication.Notifications.ObserveProtectedDataDidBecomeAvailable (Callback);
}
void Teardown ()
{
notification.Dispose ();
}
The following example shows how to use the notification with the DefaultCenter API:
// Lambda style
NSNotificationCenter.DefaultCenter.AddObserver (
UIApplication.ProtectedDataDidBecomeAvailable, (notification) => {Console.WriteLine ("Received the notification UIApplication", notification); }
// Method style
void Callback (NSNotification notification)
{
Console.WriteLine ("Received a notification UIApplication", notification);
}
void Setup ()
{
NSNotificationCenter.DefaultCenter.AddObserver (UIApplication.ProtectedDataDidBecomeAvailable, Callback);
}