UIImage.Notifications.ObserveAssistiveTouchStatusDidChange 方法
定義
重要
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多載
ObserveAssistiveTouchStatusDidChange(EventHandler<NSNotificationEventArgs>)
常數的 AssistiveTouchStatusDidChangeNotification 強型別通知。
public static Foundation.NSObject ObserveAssistiveTouchStatusDidChange (EventHandler<Foundation.NSNotificationEventArgs> handler);static member ObserveAssistiveTouchStatusDidChange : EventHandler<Foundation.NSNotificationEventArgs> -> Foundation.NSObject參數
- handler
- EventHandler<NSNotificationEventArgs>
張貼通知時叫用的方法。
傳回
權杖物件，可用來停止接收通知，方法是處置通知或傳遞至 RemoveObservers(IEnumerable<NSObject>)
備註
這個方法可以用來訂閱 AssistiveTouchStatusDidChangeNotification 通知。
// Listen to all notifications posted for any object
var token = UIImage.Notifications.ObserveAssistiveTouchStatusDidChange ((notification) => {
Console.WriteLine ("Observed AssistiveTouchStatusDidChangeNotification!");
};
// Listen to all notifications posted for a single object
var token = UIImage.Notifications.ObserveAssistiveTouchStatusDidChange (objectToObserve, (notification) => {
Console.WriteLine ($"Observed AssistiveTouchStatusDidChangeNotification for {nameof (objectToObserve)}!");
};
// Stop listening for notifications
token.Dispose ();
適用於
ObserveAssistiveTouchStatusDidChange(NSObject, EventHandler<NSNotificationEventArgs>)
常數的 AssistiveTouchStatusDidChangeNotification 強型別通知。
public static Foundation.NSObject ObserveAssistiveTouchStatusDidChange (Foundation.NSObject objectToObserve, EventHandler<Foundation.NSNotificationEventArgs> handler);static member ObserveAssistiveTouchStatusDidChange : Foundation.NSObject * EventHandler<Foundation.NSNotificationEventArgs> -> Foundation.NSObject參數
- objectToObserve
- NSObject
要觀察的物件。
- handler
- EventHandler<NSNotificationEventArgs>
張貼通知時叫用的方法。
傳回
權杖物件，可用來停止接收通知，方法是處置通知或傳遞至 RemoveObservers(IEnumerable<NSObject>)
備註
這個方法可以用來訂閱 AssistiveTouchStatusDidChangeNotification 通知。
// Listen to all notifications posted for any object
var token = UIImage.Notifications.ObserveAssistiveTouchStatusDidChange ((notification) => {
Console.WriteLine ("Observed AssistiveTouchStatusDidChangeNotification!");
};
// Listen to all notifications posted for a single object
var token = UIImage.Notifications.ObserveAssistiveTouchStatusDidChange (objectToObserve, (notification) => {
Console.WriteLine ($"Observed AssistiveTouchStatusDidChangeNotification for {nameof (objectToObserve)}!");
};
// Stop listening for notifications
token.Dispose ();