swift - 从目录中读取所有文件？

Question

我正在尝试在我的 Assets 中创建一个文件夹，然后获取其中的文件列表。听起来很简单，但对于如何做到这一点并没有明确的答案。

1. 即使是从主目录中获取列表，大多数人在 Swift 3 上也做不到，阅读这里:Getting list of files in documents folder

使用:

let fileMngr = FileManager.default;

// Full path to documents directory
let docs = fileMngr.urls(for: .documentDirectory, in: .userDomainMask)[0].path

// List all contents of directory and return as [String] OR nil if failed
return try? fileMngr.contentsOfDirectory(atPath:docs)

不工作。

1. 从特定文件夹中读取，我不明白如何获取它的 swift 路径。

有没有真正有效的从文件夹中读取的示例？

Answer 1

如果你想获取个人目录中的所有文件，这里是简单的答案

    do {
        let documentURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
        let Path = documentURL.appendingPathComponent("yourDirectoyName").absoluteURL
        let directoryContents = try FileManager.default.contentsOfDirectory(at: Path, includingPropertiesForKeys: nil, options: [])
    }
    catch {
        print(error.localizedDescription)
    }

然后如果你想读取所有具有特殊扩展名的文件，你可以这样做

static func listAllFileNamesExtension(nameDirectory: String, extensionWanted: String) -> (names : [String], paths : [URL]) {

    let documentURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
    let Path = documentURL.appendingPathComponent(nameDirectory).absoluteURL

    do {
        try FileManager.default.createDirectory(atPath: Path.relativePath, withIntermediateDirectories: true)
        // Get the directory contents urls (including subfolders urls)
        let directoryContents = try FileManager.default.contentsOfDirectory(at: Path, includingPropertiesForKeys: nil, options: [])

        // if you want to filter the directory contents you can do like this:
        let FilesPath = directoryContents.filter{ $0.pathExtension == extensionWanted }
        let FileNames = FilesPath.map{ $0.deletingPathExtension().lastPathComponent }

        return (names : FileNames, paths : FilesPath);

    } catch {
        print(error.localizedDescription)
    }

    return (names : [], paths : [])
}

所以如果你想把所有的json文件放在你的个人目录中

let allJsonNamePath = listAllFileNamesExtension(nameDirectory:"yourDirectoryName", extensionWanted: "json")