swift：保存文件文件目录

Question

我使用此代码将文件保存在文档目录中

func urlSession(_ session: URLSession,
                    downloadTask: URLSessionDownloadTask,
                    didFinishDownloadingTo location: URL){

        let fileName = downloadTask.originalRequest?.url?.lastPathComponent
        let path = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.documentDirectory, FileManager.SearchPathDomainMask.userDomainMask, true)
        let documentDirectoryPath:String = path[0]
        let fileManager = FileManager()
        let destinationURLForFile = URL(fileURLWithPath: documentDirectoryPath.appendingFormat("/\(String(describing: fileName!))"))

        do {
            try fileManager.moveItem(at: location, to: destinationURLForFile)
        }catch{
            print("error")
        }

并且文件保存此路径/Documents/filename

但我想保存这样的文件： /Documents/Folder/filename

怎么做？

Answer 1

在将文件移动到该目录之前，您需要先创建目录，如下所示：

let fileName = downloadTask.originalRequest?.url?.lastPathComponent
let path = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.documentDirectory, FileManager.SearchPathDomainMask.userDomainMask, true)
let documentDirectoryPath:String = path[0]
let fileManager = FileManager()
var destinationURLForFile = URL(fileURLWithPath: documentDirectoryPath.appending("/Folder")) //\(String(describing: fileName!))
do {
    try fileManager.createDirectory(at: destinationURLForFile, withIntermediateDirectories: true, attributes: nil)
    destinationURLForFile.appendPathComponent(String(describing: fileName!))
    try fileManager.moveItem(at: location, to: destinationURLForFile)
}catch(let error){
    print(error)
}

Answer 2

像这样创建目录 -

let paths = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.documentDirectory, FileManager.SearchPathDomainMask.userDomainMask, true)
let documentsDirectory: AnyObject = paths[0]
let dataPath = documentsDirectory.appendingPathComponent("MyFolder")!

do {
    try FileManager.default.createDirectory(atPath: dataPath.absoluteString, withIntermediateDirectories: false, attributes: nil)
} catch let error as NSError {
    print(error.localizedDescription);
}

Answer 3

试试这个代码

let fileManager = NSFileManager.defaultManager()

    // Move '/Documents/filename.hello.swift' to  '/Documents/Folder/filename/hello.swift'

do {
  try fileManager.moveItemAtPath("hello.swift", toPath: 
 "/Documents/Folder/filename/hello.swift")
   }
 catch let error as NSError {
  print("it did not worked\(error)")
  }

希望能帮助到你