NSFileHandle.Notifications.ObserveReadCompletion 方法

定義

命名空間:

Foundation

組件:

Xamarin.iOS.dll

多載

ObserveReadCompletion(EventHandler<NSFileHandleReadEventArgs>)	常數的 ReadCompletionNotification 強型別通知。
ObserveReadCompletion(NSObject, EventHandler<NSFileHandleReadEventArgs>)	常數的 ReadCompletionNotification 強型別通知。

ObserveReadCompletion(EventHandler<NSFileHandleReadEventArgs>)

常數的 ReadCompletionNotification 強型別通知。

public static Foundation.NSObject ObserveReadCompletion (EventHandler<Foundation.NSFileHandleReadEventArgs> handler);

static member ObserveReadCompletion : EventHandler<Foundation.NSFileHandleReadEventArgs> -> Foundation.NSObject

參數

handler

EventHandler<NSFileHandleReadEventArgs>

張貼通知時叫用的方法。

傳回

NSObject

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

下列範例示範開發人員如何在程式碼中使用此方法：

//
// Lambda style
//

// listening
notification = NSFileHandle.Notifications.ObserveReadCompletion ((sender, args) => {
    /* Access strongly typed args */
    Console.WriteLine ("Notification: {0}", args.Notification);

    Console.WriteLine ("AvailableData", args.AvailableData);
    Console.WriteLine ("UnixErrorCode", args.UnixErrorCode);
});

// To stop listening:
notification.Dispose ();

//
//Method style
//
NSObject notification;
void Callback (object sender, Foundation.NSFileHandleReadEventArgs args)
{
    // Access strongly typed args
    Console.WriteLine ("Notification: {0}", args.Notification);

    Console.WriteLine ("AvailableData", args.AvailableData);
    Console.WriteLine ("UnixErrorCode", args.UnixErrorCode);
}

void Setup ()
{
    notification = NSFileHandle.Notifications.ObserveReadCompletion (Callback);
}

void Teardown ()
{
    notification.Dispose ();
}

ObserveReadCompletion(NSObject, EventHandler<NSFileHandleReadEventArgs>)

常數的 ReadCompletionNotification 強型別通知。

public static Foundation.NSObject ObserveReadCompletion (Foundation.NSObject objectToObserve, EventHandler<Foundation.NSFileHandleReadEventArgs> handler);

static member ObserveReadCompletion : Foundation.NSObject * EventHandler<Foundation.NSFileHandleReadEventArgs> -> Foundation.NSObject

參數

objectToObserve

NSObject

要觀察的物件。

handler

EventHandler<NSFileHandleReadEventArgs>

張貼通知時叫用的方法。

傳回

NSObject

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 ReadCompletionNotification 通知。

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

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

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