UIView.Notifications.ObserveAnnouncementDidFinish 方法
定义
重要
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重载
ObserveAnnouncementDidFinish(EventHandler<UIAccessibilityAnnouncementFinishedEventArgs>)
常量的强类型通知 AnnouncementDidFinishNotification 。
public static Foundation.NSObject ObserveAnnouncementDidFinish(EventHandler<UIKit.UIAccessibilityAnnouncementFinishedEventArgs> handler);static member ObserveAnnouncementDidFinish : EventHandler<UIKit.UIAccessibilityAnnouncementFinishedEventArgs> -> Foundation.NSObject参数
发布通知时调用的方法。
返回
令牌对象，可用于停止接收通知，方法是释放通知或将其传递给 RemoveObservers(IEnumerable<NSObject>)
注解
此方法可用于订阅 AnnouncementDidFinishNotification 通知。
// Listen to all notifications posted for any object
var token = UIView.Notifications.ObserveAnnouncementDidFinish ((notification) => {
Console.WriteLine ("Observed AnnouncementDidFinishNotification!");
};
// Listen to all notifications posted for a single object
var token = UIView.Notifications.ObserveAnnouncementDidFinish (objectToObserve, (notification) => {
Console.WriteLine ($"Observed AnnouncementDidFinishNotification for {nameof (objectToObserve)}!");
};
// Stop listening for notifications
token.Dispose ();
适用于
ObserveAnnouncementDidFinish(NSObject, EventHandler<UIAccessibilityAnnouncementFinishedEventArgs>)
常量的强类型通知 AnnouncementDidFinishNotification 。
public static Foundation.NSObject ObserveAnnouncementDidFinish(Foundation.NSObject objectToObserve, EventHandler<UIKit.UIAccessibilityAnnouncementFinishedEventArgs> handler);static member ObserveAnnouncementDidFinish : Foundation.NSObject * EventHandler<UIKit.UIAccessibilityAnnouncementFinishedEventArgs> -> Foundation.NSObject参数
- objectToObserve
- NSObject
要观察的对象。
发布通知时调用的方法。
返回
令牌对象，可用于停止接收通知，方法是释放通知或将其传递给 RemoveObservers(IEnumerable<NSObject>)
注解
此方法可用于订阅 AnnouncementDidFinishNotification 通知。
// Listen to all notifications posted for any object
var token = UIView.Notifications.ObserveAnnouncementDidFinish ((notification) => {
Console.WriteLine ("Observed AnnouncementDidFinishNotification!");
};
// Listen to all notifications posted for a single object
var token = UIView.Notifications.ObserveAnnouncementDidFinish (objectToObserve, (notification) => {
Console.WriteLine ($"Observed AnnouncementDidFinishNotification for {nameof (objectToObserve)}!");
};
// Stop listening for notifications
token.Dispose ();