从文档目录的子文件夹中获取文件列表 swift ios

Question

我正在使用此代码从文档目录中获取 PDF 文件列表。现在，如果该文件夹存在，我想从文档目录中名为“MyFiles”的文件夹中查找 PDF 文件列表。

我怎样才能做到这一点？？

func listFilesFromDocumentsFolder() -> [String]
{
    var theError = NSErrorPointer()
    let dirs = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.AllDomainsMask, true) as? [String]

    if dirs != nil {
        let dir = dirs![0]
        let fileList = NSFileManager.defaultManager().contentsOfDirectoryAtPath(dir, error: theError) as! [String]
        var count = fileList.count
        for var i = 0; i < count; i++
        {
            var filePath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).first as! String
            filePath = filePath.stringByAppendingPathComponent(fileList[i])
            let properties = [NSURLLocalizedNameKey, NSURLCreationDateKey, NSURLContentModificationDateKey, NSURLLocalizedTypeDescriptionKey]
            var attr = NSFileManager.defaultManager().attributesOfItemAtPath(filePath, error: NSErrorPointer())
        }
        return fileList.filter{ $0.pathExtension == "pdf" }.map{ $0.lastPathComponent } as [String]
    }else{
        let fileList = [""]
        return fileList
    }
}

提前致谢..

Answer 1

我认为这可能通过实现 NSFileManager 的扩展来实现 SequenceType 协议。但是您可以轻松地将代码转换为使用 while 循环：

// path to documents directory
let documentDirectoryPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).first as! String
let myFilesPath = documentDirectoryPath.stringByAppendingPathComponent("/MyFiles")
let files = filemanager.enumeratorAtPath(myFilesPath)
while let file = files?.nextObject() {
     println(file)
}