请问我如何在swift 3中同时制作多个下载文件 我只能下载一个文件，但我怎么能做多个下载文件，我可以控制每个文件，如表视图单元格中的暂停，恢复和进度视图
以下代码下载一个文件：
fun loadMp3() {
let videoMp3 = "http://www.example.com"
let url = URL(string: videoMp3)
let sessionConfig = URLSessionConfiguration.default
let session = URLSession(configuration: sessionConfig, delegate: nil, delegateQueue: nil)
let request = NSMutableURLRequest(url: url!)
request.httpMethod = "GET"
let task = session.dataTask(with: url!, completionHandler: {
(data,response,error) in
if error == nil {
if let response = response as? HTTPURLResponse {
if response.statusCode == 200 {
if data != nil {
do {
let responseOfJson = try JSONSerialization.jsonObject(with: data!, options: .allowFragments) as? NSDictionary
let getLink = responseOfJson?["link"] as! String
let getVideo = URL(string: getLink)
print("Downloading...")
DispatchQueue.global(qos: .background).async {
DispatchQueue.main.async {
let getData = try! Data(contentsOf: getVideo!)
self.progressBar.setProgress(Float(getData.count), animated: true)
let fileManager = FileManager.default
let document = try! fileManager.url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: true)
let file = document.appendingPathComponent("WadaetAlhussien.mp3")
try! getData.write(to: file)
print(file)
}
}
}catch {
print(error)
}
}
}
}
}
})
task.resume()
}
感谢所有