UIBarItem.Notifications.ObserveDarkerSystemColorsStatusDidChange 方法

定义

命名空间:

UIKit

程序集:

Xamarin.iOS.dll

重载

ObserveDarkerSystemColorsStatusDidChange(NSObject, EventHandler<NSNotificationEventArgs>)	常量的强类型通知 DarkerSystemColorsStatusDidChangeNotification 。
ObserveDarkerSystemColorsStatusDidChange(EventHandler<NSNotificationEventArgs>)	常量的强类型通知 DarkerSystemColorsStatusDidChangeNotification 。

ObserveDarkerSystemColorsStatusDidChange(NSObject, EventHandler<NSNotificationEventArgs>)

常量的强类型通知 DarkerSystemColorsStatusDidChangeNotification 。

public static Foundation.NSObject ObserveDarkerSystemColorsStatusDidChange (Foundation.NSObject objectToObserve, EventHandler<Foundation.NSNotificationEventArgs> handler);

static member ObserveDarkerSystemColorsStatusDidChange : Foundation.NSObject * EventHandler<Foundation.NSNotificationEventArgs> -> Foundation.NSObject

参数

objectToObserve

NSObject

要观察的对象。

handler

EventHandler<NSNotificationEventArgs>

发布通知时调用的方法。

返回

NSObject

令牌对象，可用于通过释放通知或将其传递给来停止接收通知 RemoveObservers(IEnumerable<NSObject>)

注解

此方法可用于订阅 DarkerSystemColorsStatusDidChangeNotification 通知。

// Listen to all notifications posted for any object
var token = UIBarItem.Notifications.ObserveDarkerSystemColorsStatusDidChange ((notification) => {
	Console.WriteLine ("Observed DarkerSystemColorsStatusDidChangeNotification!");
};

// Listen to all notifications posted for a single object
var token = UIBarItem.Notifications.ObserveDarkerSystemColorsStatusDidChange (objectToObserve, (notification) => {
	Console.WriteLine ($"Observed DarkerSystemColorsStatusDidChangeNotification for {nameof (objectToObserve)}!");
};

// Stop listening for notifications
token.Dispose ();

ObserveDarkerSystemColorsStatusDidChange(EventHandler<NSNotificationEventArgs>)

常量的强类型通知 DarkerSystemColorsStatusDidChangeNotification 。

public static Foundation.NSObject ObserveDarkerSystemColorsStatusDidChange (EventHandler<Foundation.NSNotificationEventArgs> handler);

static member ObserveDarkerSystemColorsStatusDidChange : EventHandler<Foundation.NSNotificationEventArgs> -> Foundation.NSObject

参数

handler

EventHandler<NSNotificationEventArgs>

发布通知时调用的方法。

返回

NSObject

令牌对象，可用于通过释放通知或将其传递给来停止接收通知 RemoveObservers(IEnumerable<NSObject>)

注解

此方法可用于订阅 DarkerSystemColorsStatusDidChangeNotification 通知。

// Listen to all notifications posted for any object
var token = UIBarItem.Notifications.ObserveDarkerSystemColorsStatusDidChange ((notification) => {
	Console.WriteLine ("Observed DarkerSystemColorsStatusDidChangeNotification!");
};

// Listen to all notifications posted for a single object
var token = UIBarItem.Notifications.ObserveDarkerSystemColorsStatusDidChange (objectToObserve, (notification) => {
	Console.WriteLine ($"Observed DarkerSystemColorsStatusDidChangeNotification for {nameof (objectToObserve)}!");
};

// Stop listening for notifications
token.Dispose ();