AVAudioSession.Notifications.ObserveInterruption 方法

定义

命名空间:

AVFoundation

程序集:

Xamarin.iOS.dll

重载

ObserveInterruption(EventHandler<AVAudioSessionInterruptionEventArgs>)	常量的强类型通知 InterruptionNotification 。
ObserveInterruption(NSObject, EventHandler<AVAudioSessionInterruptionEventArgs>)	常量的强类型通知 InterruptionNotification 。

ObserveInterruption(EventHandler<AVAudioSessionInterruptionEventArgs>)

常量的强类型通知 InterruptionNotification 。

public static Foundation.NSObject ObserveInterruption (EventHandler<AVFoundation.AVAudioSessionInterruptionEventArgs> handler);

static member ObserveInterruption : EventHandler<AVFoundation.AVAudioSessionInterruptionEventArgs> -> Foundation.NSObject

参数

handler

EventHandler<AVAudioSessionInterruptionEventArgs>

发布通知时调用的方法。

返回

NSObject

令牌对象，可用于通过释放通知或将其传递给来停止接收通知 RemoveObservers(IEnumerable<NSObject>)

注解

以下示例演示开发人员如何在代码中使用此方法：

//
// Lambda style
//

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

    Console.WriteLine ("InterruptionType", args.InterruptionType);
    Console.WriteLine ("Option", args.Option);
    Console.WriteLine ("WasSuspended", args.WasSuspended);
});

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

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

    Console.WriteLine ("InterruptionType", args.InterruptionType);
    Console.WriteLine ("Option", args.Option);
    Console.WriteLine ("WasSuspended", args.WasSuspended);
}

void Setup ()
{
    notification = AVAudioSession.Notifications.ObserveInterruption (Callback);
}

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

ObserveInterruption(NSObject, EventHandler<AVAudioSessionInterruptionEventArgs>)

常量的强类型通知 InterruptionNotification 。

public static Foundation.NSObject ObserveInterruption (Foundation.NSObject objectToObserve, EventHandler<AVFoundation.AVAudioSessionInterruptionEventArgs> handler);

static member ObserveInterruption : Foundation.NSObject * EventHandler<AVFoundation.AVAudioSessionInterruptionEventArgs> -> Foundation.NSObject

参数

objectToObserve

NSObject

要观察的特定对象。

handler

EventHandler<AVAudioSessionInterruptionEventArgs>

发生通知时响应通知的处理程序。

返回

NSObject

令牌对象，可用于通过释放通知或将其传递给来停止接收通知 RemoveObservers(IEnumerable<NSObject>)

注解

此方法可用于订阅 InterruptionNotification 通知。

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

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

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