WKInterfaceObject.ClosedCaptioningStatusDidChangeNotification 属性

定义

命名空间:

WatchKit

程序集:

Xamarin.iOS.dll

ClosedCaptioningStatusDidChange 的通知常量

[Foundation.Advice("Use WKInterfaceObject.Notifications.ObserveClosedCaptioningStatusDidChange helper method instead.")]
[Foundation.Field("UIAccessibilityClosedCaptioningStatusDidChangeNotification", "WatchKit")]
[ObjCRuntime.Unavailable(ObjCRuntime.PlatformName.WatchOS, ObjCRuntime.PlatformArchitecture.All, null)]
public static Foundation.NSString ClosedCaptioningStatusDidChangeNotification { [ObjCRuntime.Unavailable(ObjCRuntime.PlatformName.WatchOS, ObjCRuntime.PlatformArchitecture.All, null)] get; }

member this.ClosedCaptioningStatusDidChangeNotification : Foundation.NSString

属性值

NSString

NSString 常量 应用作 NSNotificationCenter 的标记。

属性

AdviceAttribute FieldAttribute UnavailableAttribute

注解

此常量可用于注册 NSNotificationCenter 此通知的侦听器。 这是 NSString 而不是字符串，因为这些值可以用作某些本机库中的标记，而不是纯粹用于其实际字符串内容。 回调的“notification”参数包含特定于通知类型的额外信息。

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


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

void Setup ()
{
    NSNotificationCenter.DefaultCenter.AddObserver (WKInterfaceObject.ClosedCaptioningStatusDidChangeNotification, Callback);
}