共用方式為


PdfView.Notifications.ObserveChangedHistory 方法

定義

多載

ObserveChangedHistory(EventHandler<NSNotificationEventArgs>)

常數的 ChangedHistoryNotification 強型別通知。

ObserveChangedHistory(NSObject, EventHandler<NSNotificationEventArgs>)

常數的 ChangedHistoryNotification 強型別通知。

ObserveChangedHistory(EventHandler<NSNotificationEventArgs>)

常數的 ChangedHistoryNotification 強型別通知。

public static Foundation.NSObject ObserveChangedHistory (EventHandler<Foundation.NSNotificationEventArgs> handler);
static member ObserveChangedHistory : 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 ChangedHistoryNotification 通知。

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

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

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

適用於

ObserveChangedHistory(NSObject, EventHandler<NSNotificationEventArgs>)

常數的 ChangedHistoryNotification 強型別通知。

public static Foundation.NSObject ObserveChangedHistory (Foundation.NSObject objectToObserve, EventHandler<Foundation.NSNotificationEventArgs> handler);
static member ObserveChangedHistory : 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 ChangedHistoryNotification 通知。

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

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

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

適用於