使用Swift保存其他名称的文件

Question

I am using Alamofire to download files from the server. But i want to name it differently just like how we download the file from web and can name it as we want, same How is it possible in swift

I am using the following code:-

Alamofire.download(fileUrl, to: destination)
        .downloadProgress { progress in
            print("Download Progress:---------- \   
        (progress.fractionCompleted)")


        }
        .responseData { response in

            print(response.request)
            print(response.response)
            print(response.temporaryURL)
            print(response.destinationURL)
            print(response.error)

    }

Prefering not to use alamofire to rename or overrite files. Is there any other method

Answer 1

Here is the hands on function to save your Data into DocumentDirectory with the name you given. This method have one call back which will call after performing saving action, it will return the path where the image saved in directory. This function written in Swift 3 .

func saveImageInDocDirectory(data: Data?, fileName: String?, successblock: @escaping (_ path: String?) -> Void) { // To add the image to cache for given identifier.

    let paths = NSSearchPathForDirectoriesInDomains( .documentDirectory, .userDomainMask, true)[0] as String
    let path = paths.appending("/\(fileName!)")
    if !FileManager.default.fileExists(atPath: path) {
        do {
            try FileManager.default.createDirectory(at: URL(fileURLWithPath: path), withIntermediateDirectories: false, attributes: nil)
        } catch {
            print("Error creating images folder in Cache dir: \(error)")
        }
    }

    if (filemgr.fileExists(atPath: path)) {
        try! filemgr.removeItem(atPath: path)
    } else {
        do {
            try data?.write(to: URL(fileURLWithPath: path, isDirectory: false))
            successblock(path)
        } catch {
            successblock(nil)
            print("Error while caching the data in cache folder.")
        }
    }

}

you can call this method like,

Alamofire.download(fileUrl, to: destination)
    .downloadProgress { progress in
        print("Download Progress:---------- \   
    (progress.fractionCompleted)")


    }
    .responseData { response in

        print(response.request)
        print(response.response)
        print(response.temporaryURL)
        print(response.destinationURL)
        print(response.error)
       if let data = response.result.value {
         self.saveImageInDocDirectory(data: data, fileName: "YourFile",  successblock: { (path) in

                print(path)

            }
       }

}

Thanks.