UIView.Notifications.ObserveReduceTransparencyStatusDidChange 方法

定义

命名空间:

UIKit

程序集:

Xamarin.iOS.dll

重载

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

ObserveReduceTransparencyStatusDidChange(EventHandler<NSNotificationEventArgs>)

常量的强类型通知 ReduceTransparencyStatusDidChangeNotification 。

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

static member ObserveReduceTransparencyStatusDidChange : 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 ReduceTransparencyStatusDidChangeNotification 通知。

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

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

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

ObserveReduceTransparencyStatusDidChange(NSObject, EventHandler<NSNotificationEventArgs>)

常量的强类型通知 ReduceTransparencyStatusDidChangeNotification 。

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

static member ObserveReduceTransparencyStatusDidChange : 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 ReduceTransparencyStatusDidChangeNotification 通知。

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

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

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