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