NSAudioStatus的NSOSStatusErrorDomain代码= -54 [英] NSOSStatusErrorDomain Code=-54 for AVAudioPlayer

问题描述

AVAudioPlayer在某些本地MP3文件上给我以下错误:

AVAudioPlayer has been giving me the following error on some local MP3 files:

Error Domain=NSOSStatusErrorDomain Code=-54 "(null)"  

我正在将一个zip文件下载到Documents目录，然后使用名为 SSZipArchive 的库将其解压缩.

I'm downloading a zip file to the Documents directory, then unzipping using a library called SSZipArchive.

在Documents目录中，将创建一个文件夹来包含解压缩的文件.

In the Documents directory, a folder is created to contain the unzipped files.

我可以毫无问题地播放整张专辑. 一切正常，直到我开始下载某些文件.

I was able to play entire albums without any issues. Everything was going fine until I start downloading certain files.

我一直在寻找类似的问题(osx)，可能说这是一个权限错误，但是我没有设法使其正常工作.

I've looked for similar questions (osx), possibly stating that this is a permission error, but I haven't managed to make it work.

有人知道这个错误是什么吗? 似乎也没有任何文档.

Does anyone know what this error is? It seems to not be on any documentation either.

例如.

let fileManager = NSFileManager.defaultManager()
var docDirectory = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0]

func showContentsOfSubDirectories() {
    do {
        let files = try fileManager.contentsOfDirectoryAtPath(docDirectory)
        print("----")
        for file in files {
            print("> \(file)")
            do {
                var rsrc: AnyObject?
                let possibleDir = NSURL(fileURLWithPath: docDirectory + "/" + file)
                try possibleDir.getResourceValue(&rsrc, forKey: NSURLIsDirectoryKey)
                if let isDirectory = rsrc as? NSNumber {
                    if Bool(isDirectory) {
                        let subFiles = try fileManager.contentsOfDirectoryAtPath(docDirectory + "/" + file)
                        for subFile in subFiles {
                            print("  >> \(subFile)")
                        }
                    }
                }
            } catch let error as NSError {
                print(error)
            }
        }
        print("----")
    } catch let error as NSError {
        print(error)
    }
}

我使用上面的代码检查目录. 这样可以调试:

I use the above code for checking the directory. This would give me in debugging:

相册名称

SONG1.mp3

SONG1.mp3

SONG2.mp3

SONG2.mp3

SONG3.mp3

SONG3.mp3

SONG4.mp3

SONG4.mp3

所以它存在.

let filePath = docDirectory + "/" + ALBUM_NAME + "/SONG1.mp3"
//  ~/Library/Developer/CoreSimulator/Devices/XXX/data/Containers/Data/Application/XXX/ 
// Same issue happens on actual device too

do {
    try player = AVAudioPlayer(contentsOfURL: NSURL(fileURLWithPath: filePath!))
} catch let error as NSError {
}

这在某些情况下有效，而在其他情况下无效.

This works on some and doesn't on others.

推荐答案

我遇到了相同的错误，并且可以确认它是(至少就我而言)权限错误.具体来说，与NSFileProtectionKey有关.

I hit the same error and I can confirm that it was (at least, in my case) a permissions error. Specifically, related to the NSFileProtectionKey.

将NSFileProtectionKey设置为NSFileProtectionNone即可解决此问题.

Setting NSFileProtectionKey to NSFileProtectionNone solves it.

这篇关于NSAudioStatus的NSOSStatusErrorDomain代码= -54的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！