从内存AVAudioPlayer preloaded声音泄漏 [英] AVAudioPlayer preloaded sound leaks from memory

问题描述

我有一个AVAudioPlayer实例声音加载在内存中 audioPlayer。prepareToPlay（），然后几个开始播放后它。我有一个进入的背景大约10分钟后，从内存泄漏问题，我是不是被prepared。美联储小时后，我不必 prepareToPlay（）再次运行的能力。如何留在内存preloaded声音长期？我是preparing声音 applicationDidFinishLaunchingWithOptions玩方法：

I have an AVAudioPlayer instance that loads sound in memory with audioPlayer.prepareToPlay(), and then after a few start playing it. I have a problem that in approximately ten minutes after entering background, it leaks from memory and I is not being prepared. After that fed hours, I don't have an ability to run prepareToPlay() again. How to leave that preloaded sound in memory for a long term? I am preparing sound to play in applicationDidFinishLaunchingWithOptionsmethod:

let dispatchQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)
    dispatch_async(dispatchQueue, {[weak self] in
        var audioSessionError: NSError?

        let audioSession = AVAudioSession.sharedInstance()
        NSNotificationCenter.defaultCenter().addObserver(self!, selector: "handleInterruption:", name: AVAudioSessionInterruptionNotification, object: nil)
        audioSession.setActive(true, error: nil)

        if (audioSession.setCategory(AVAudioSessionCategoryPlayback, error: &audioSessionError)) {
            println("Successfully set the audio session")
        } else {
            println("Could not set the audio session")
        }

        let filePath = NSBundle.mainBundle().pathForResource("sound", ofType:"mp3")
        let fileData = NSData(contentsOfFile: filePath!, options: .DataReadingMappedIfSafe, error: nil)
        var error:NSError?

        self!.audioPlayer = AVAudioPlayer(data: fileData, error: &error)

        self!.audioPlayer?.numberOfLoops = -1

        self!.audioPlayer?.delegate = self

        if (self?.audioPlayer?.prepareToPlay() != false) {
            println("Successfully prepared for playing")
        } else {
            println("Failed to prepare for playing")
        }
    })

然后在 didReceiveRemoteNotification 我想在后台发挥它：<？code> self.audioPlayer .play（），它的收益真正 。也许它的工作原理，但对10后 - 等待20分钟这是行不通的。并注意 .play（）现在的收益假

Then in didReceiveRemoteNotification I am trying to play it in background: self.audioPlayer?.play(), it returns true. Probably it works, but after about 10 - 20 minutes it does not work. And note that .play() now returns false.

1. 的是否有禁用ARC（自动引用计数）释放和dealloc的 audioPlayer 手动？的

的也许我需要使用较低级别的API，如的OpenAL ？但是，由于它是在iOS的9 pcated德$ P $我不会用它，以后我会需要重写一遍，而不的OpenAL 。的

Maybe I need to use lower level APIs such as OpenAL? However I won't use it since it is deprecated in iOS 9 and later I will need to rewrite it without OpenAL.

的任何更多的想法？也许我需要使用音频单元与 RemoteIO ？如果它会工作，提供一些例子吧。的

Any more ideas? Maybe I need to use Audio Units with RemoteIO? If it will work, provide some examples please.

的也许有第三方框架如 ObjectAL - 一个简单的实施的OpenAL 的。据我所知它是可在iOS中9。的

Maybe there are third party frameworks like ObjectAL - an easy implementation of OpenAL. As I know it is available in iOS 9.

这些方法都只是我的假设。但其中最主要的问题是一样的：将这些方法从后台工作

These methods are just my assumptions. But them main question remains the same: Will those methods work from background?

推荐答案

您应该只禁用ARC。当你进入研究背景，然后如果你不使用它，它被释放。在斯威夫特创造AVAudioPlayer为未管理＆LT; T＆GT; 对象

You should just disable ARC. When you enter backgroud, then if you don't use it it is being released. In Swift create AVAudioPlayer as Unmanaged<T> object.

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