iOS

Question

我用 swift 做了一个音乐播放器。我希望用户通过 iTunes 中的共享文件夹添加音乐文件。我创建了共享文件夹。如何从共享文件夹加载文件到 UITableViewCell 然后管理它们？

Answer 1

我写了下面的代码。对我有用

        func exportFilesFromFolder() {
        var folder = fileManager.URLsForDirectory(NSSearchPathDirectory.DocumentDirectory, inDomains: NSSearchPathDomainMask.UserDomainMask).first as! NSURL
        var allFiles = fileManager.contentsOfDirectoryAtURL(folder, includingPropertiesForKeys: nil, options: NSDirectoryEnumerationOptions.SkipsHiddenFiles, error: nil)!
        var filterArray = allFiles.map(){ [=10=].lastPathComponent }.filter(){ [=10=].pathExtension == "mp3" } as [String]
//        println("filter array \(allFiles[3])")
        var superURL: NSURL!
        for itemInFilterArray in filterArray {
            var direct = fileManager.URLsForDirectory(NSSearchPathDirectory.DocumentDirectory, inDomains: NSSearchPathDomainMask.UserDomainMask)
            if var url: NSURL = direct.first as? NSURL {
                superURL = url.URLByAppendingPathComponent(itemInFilterArray)
            }
            var playerItem = AVPlayerItem(URL: superURL)
            var equalazerString: String!
            var commonMetaData = playerItem.asset.commonMetadata as! [AVMetadataItem]
            for item in commonMetaData {
                if item.commonKey == "title" {
                    equalazerString = item.stringValue
                    if equalazerString == currentSongString {
                        localArrayNames.append(superURL)
                    } else {
//                        println("it is not equals")
                    }
                }
            }
        }
    }

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