UIImage.SwitchControlStatusDidChangeNotification 属性

定义

命名空间:

UIKit

程序集:

Xamarin.iOS.dll

SwitchControlStatusDidChange 的通知常量

[Foundation.Advice("Use UIImage.Notifications.ObserveSwitchControlStatusDidChange helper method instead.")]
[Foundation.Field("UIAccessibilitySwitchControlStatusDidChangeNotification", "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 SwitchControlStatusDidChangeNotification { [ObjCRuntime.Introduced(ObjCRuntime.PlatformName.iOS, 8, 0, ObjCRuntime.PlatformArchitecture.All, null)] [ObjCRuntime.Unavailable(ObjCRuntime.PlatformName.WatchOS, ObjCRuntime.PlatformArchitecture.All, null)] get; }

member this.SwitchControlStatusDidChangeNotification : Foundation.NSString

属性值

NSString

NSString 常量应用作 NSNotificationCenter 的令牌。

属性

AdviceAttribute FieldAttribute IntroducedAttribute 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 (
        UIImage.SwitchControlStatusDidChangeNotification, (notification) => {Console.WriteLine ("Received the notification UIImage", notification); }


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

void Setup ()
{
    NSNotificationCenter.DefaultCenter.AddObserver (UIImage.SwitchControlStatusDidChangeNotification, Callback);
}

这可以从后台线程使用。