AVAsset.Notifications.ObserveContainsFragmentsDidChange 方法

定义

重载

ObserveContainsFragmentsDidChange(EventHandler<NSNotificationEventArgs>)

常量的强类型通知 ContainsFragmentsDidChangeNotification

ObserveContainsFragmentsDidChange(NSObject, EventHandler<NSNotificationEventArgs>)

常量的强类型通知 ContainsFragmentsDidChangeNotification

ObserveContainsFragmentsDidChange(EventHandler<NSNotificationEventArgs>)

常量的强类型通知 ContainsFragmentsDidChangeNotification

public static Foundation.NSObject ObserveContainsFragmentsDidChange (EventHandler<Foundation.NSNotificationEventArgs> handler);
static member ObserveContainsFragmentsDidChange : EventHandler<Foundation.NSNotificationEventArgs> -> Foundation.NSObject

参数

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 ContainsFragmentsDidChangeNotification 通知。

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

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

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

适用于

ObserveContainsFragmentsDidChange(NSObject, EventHandler<NSNotificationEventArgs>)

常量的强类型通知 ContainsFragmentsDidChangeNotification

public static Foundation.NSObject ObserveContainsFragmentsDidChange (Foundation.NSObject objectToObserve, EventHandler<Foundation.NSNotificationEventArgs> handler);
static member ObserveContainsFragmentsDidChange : Foundation.NSObject * EventHandler<Foundation.NSNotificationEventArgs> -> Foundation.NSObject

参数

objectToObserve
NSObject

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 ContainsFragmentsDidChangeNotification 通知。

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

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

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

适用于