中断后我已经挣了好几个小时才恢复背景音频播放(例如通话)

应该怎么做：

>当应用程序转到后台时,音频会继续播放(工作)
>当被呼叫中断时,开始通知中断
(作品)
>通话结束后,获取中断通知
结束(工作)
>继续播放音频(不起作用 – 什么都听不到)

真的很感激任何帮助！谢谢

笔记：

>该应用程序已注册为背景音频,并在中断前播放正常
>我已经尝试过,没有时间延迟恢复播放 – 都没有工作

码：

import UIKit
import AVFoundation
 
var player: AVQueuePlayer!
 
class ViewController: UIViewController {
 
    override func viewDidLoad() {
        super.viewDidLoad()
        do {
            try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback)
            try AVAudioSession.sharedInstance().setActive(true,withOptions: .NotifyOthersOnDeactivation)
        } catch { }
        let songNames = ["music"]
        let songs = songNames.map { AVPlayerItem(URL:
            NSBundle.mainBundle().URLForResource($0,withExtension: "mp3")!) }
        player = AVQueuePlayer(items: songs)
 
        let theSession = AVAudioSession.sharedInstance()
        NSNotificationCenter.defaultCenter().addObserver(self,selector:"playInterrupt:",name:AVAudioSessionInterruptionNotification,object: theSession)
 
        player.play()
    }
 
    func playInterrupt(notification: NSNotification) {
 
        if notification.name == AVAudioSessionInterruptionNotification
            && notification.userInfo != nil {
 
            var info = notification.userInfo!
            var intValue: UInt = 0
            (info[AVAudioSessionInterruptionTypeKey] as! NSValue).getValue(&intValue)
            if let type = AVAudioSessionInterruptionType(rawValue: intValue) {
                switch type {
                case .Began:
                    print("aaaaarrrrgggg you stole me")
                    player.pause()
 
                case .Ended:
                    let timer = NSTimer.scheduledTimerWithTimeInterval(3,target: self,selector: "resumeNow:",userInfo: nil,repeats: false)
                }
            }
        }
    }
    func resumeNow(timer : NSTimer) {
        player.play()
        print("attempted restart")
    }
}