iOS：数据会话与临时会话

Swift
let url = URL(string: "https://example.com/file.mp4")!
let session = URLSession.shared
let task = session.downloadTask(with: url) { (location, response, error) in
    if let location = location {
        // 将文件移动到指定位置
        let destinationURL = FileManager.default.urls(for: .documentDirectory, in: .userDomAInMask).first!.appendingPathComponent("file.mp4")
        try? FileManager.default.moveItem(at: location, to: destinationURL)
    }
}
task.resume()

Swift
let url = URL(string: "https://api.example.com/data")!
let session = URLSession.shared
let task = session.dataTask(with: url) { (data, response, error) in
    if let data = data {
        // 处理返回的数据
    }
}
task.resume()