UIView.GrayscaleStatusDidChangeNotification Property

Definition

Namespace:

UIKit

Assembly:

Xamarin.iOS.dll

Notification constant for GrayscaleStatusDidChange

[Foundation.Advice("Use UIView.Notifications.ObserveGrayscaleStatusDidChange helper method instead.")]
[Foundation.Field("UIAccessibilityGrayscaleStatusDidChangeNotification", "UIKit")]
[ObjCRuntime.Introduced(ObjCRuntime.PlatformName.iOS, 8, 0, ObjCRuntime.PlatformArchitecture.All, null)]
[ObjCRuntime.Unavailable(ObjCRuntime.PlatformName.WatchOS, ObjCRuntime.PlatformArchitecture.All, null)]
public static Foundation.NSString GrayscaleStatusDidChangeNotification { [ObjCRuntime.Introduced(ObjCRuntime.PlatformName.iOS, 8, 0, ObjCRuntime.PlatformArchitecture.All, null)] [ObjCRuntime.Unavailable(ObjCRuntime.PlatformName.WatchOS, ObjCRuntime.PlatformArchitecture.All, null)] get; }

member this.GrayscaleStatusDidChangeNotification : Foundation.NSString

Property Value

NSString

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

Attributes

AdviceAttribute FieldAttribute IntroducedAttribute UnavailableAttribute

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.

// Lambda style
NSNotificationCenter.DefaultCenter.AddObserver (
        UIView.GrayscaleStatusDidChangeNotification, (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.GrayscaleStatusDidChangeNotification, Callback);
}