UIView.VoiceOverStatusDidChangeNotification UIView.VoiceOverStatusDidChangeNotification Property

Definition

Notification constant for VoiceOverStatusDidChange

[Foundation.Advice("Use UIView.Notifications.ObserveVoiceOverStatusDidChange helper method instead.")]
[Foundation.Field("UIAccessibilityVoiceOverStatusDidChangeNotification", "UIKit")]
[ObjCRuntime.Introduced(ObjCRuntime.PlatformName.TvOS, 11, 0, ObjCRuntime.PlatformArchitecture.All, null)]
[ObjCRuntime.Introduced(ObjCRuntime.PlatformName.iOS, 11, 0, ObjCRuntime.PlatformArchitecture.All, null)]
[ObjCRuntime.Unavailable(ObjCRuntime.PlatformName.WatchOS, ObjCRuntime.PlatformArchitecture.All, null)]
[get: ObjCRuntime.Introduced(ObjCRuntime.PlatformName.TvOS, 11, 0, ObjCRuntime.PlatformArchitecture.All, null)]
[get: ObjCRuntime.Introduced(ObjCRuntime.PlatformName.iOS, 11, 0, ObjCRuntime.PlatformArchitecture.All, null)]
[get: ObjCRuntime.Unavailable(ObjCRuntime.PlatformName.WatchOS, ObjCRuntime.PlatformArchitecture.All, null)]
public static Foundation.NSString VoiceOverStatusDidChangeNotification { get; }
member this.VoiceOverStatusDidChangeNotification : Foundation.NSString

Property Value

NSString constant, should be used as a token to NSNotificationCenter.

Remarks

This constant can be used with the NSNotificationCenter to register a listener for this notification, also developers can use the strongly typed notification ObserveVoiceOverStatusDidChange instead. 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.


// Lambda style
NSNotificationCenter.DefaultCenter.AddObserver (
        UIView.VoiceOverStatusDidChangeNotification, (notification) => {Console.WriteLine ("Received the notification UIView", notification); }

// Method style void Callback (NSNotification notification) { Console.WriteLine ("Received a notification UIView", notification); }

void Setup () { NSNotificationCenter.DefaultCenter.AddObserver (UIView.VoiceOverStatusDidChangeNotification, Callback); }

Applies to