UIBarItem.GrayscaleStatusDidChangeNotification 屬性

定義

命名空間:

UIKit

組件:

Xamarin.iOS.dll

GrayscaleStatusDidChange 的通知常數

[Foundation.Advice("Use UIBarItem.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

屬性值

NSString

NSString 常數應作為 NSNotificationCenter 的權杖使用。

屬性

AdviceAttribute FieldAttribute IntroducedAttribute UnavailableAttribute

備註

這個常數可以與 搭配 NSNotificationCenter 使用，以註冊此通知的接聽程式。 這是 NSString 而不是字串，因為這些值可以當做某些原生程式庫中的標記使用，而不是單純用於其實際字串內容。 回呼的 'notification' 參數包含通知類型特有的額外資訊。

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


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

void Setup ()
{
NSNotificationCenter.DefaultCenter.AddObserver (UIBarItem.GrayscaleStatusDidChangeNotification, Callback);
}