swift - 如何快速移动文件

Question

在使用 UIDocumentPickerViewController 选择文件后，我试图将文件移动到文档目录。

我没有看到任何错误，但文件没有移动到目录中。

我想知道如何移动文件。

class MyClassController: UIViewController,UIDocumentPickerDelegate {

 var thisURL:URL?   

  @IBAction func add(_ sender: Any) {


    let add = UIAlertAction(title: "add", style: .default, handler: {(alert: UIAlertAction!) in                         
          do {

            let myURL = URL(string:"\(self.thisURL!)")!


                   let path = try FileManager.default.url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: true)


                let MyDesPath = path.appendingPathComponent(myURL.lastPathComponent)

                            print(path)
                                do {
                                if FileManager.default.fileExists(atPath: “\(MyDesPath)") == false {
                                                                           try  FileManager.default.moveItem(at: myURL, to: URL(string:”\(MyDesPath)")!)

                                                                       }
                                                                       else {

                                                                       }
                                                                      }
                                                                        catch let error {
                                                                         print(error)
                                                                     }

                                                                           }

                                                                     catch let error{
                                                                         print(error)
                                                                         return
                                                                     }

    })
 func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]) {
     NSLog("documentPicker executed")
    thisURL = urls[0]

    self.fileName.text = "\(thisURL!.lastPathComponent)"


    }
 }

Answer 1

我之前做过同样的事情，请引用以下步骤和代码:

创建临时文件夹的文件 URL

 var tempURL = URL(fileURLWithPath: NSTemporaryDirectory())          

将文件名和扩展名附加到 URL

 tempURL.appendPathComponent(url.lastPathComponent)

如果存在同名文件，则将其删除(用新文件替换文件)

完整代码:

func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]) {
    let newUrls = urls.flatMap { (url: URL) -> URL? in

        var tempURL = URL(fileURLWithPath: NSTemporaryDirectory())          
        tempURL.appendPathComponent(url.lastPathComponent)
        do {

            if FileManager.default.fileExists(atPath: tempURL.path) {
                try FileManager.default.removeItem(atPath: tempURL.path)
            }
            try FileManager.default.moveItem(atPath: url.path, toPath: tempURL.path)
            return tempURL
        } catch {
            print(error.localizedDescription)
            return nil
        }
    }
}