$ gem install cocoapods

source 'https://github.com/CocoaPods/Specs.git'
platform :ios, '10.0'
use_frameworks!

target '<Your Target Name>' do
    pod 'Tiercel'
end

$ pod install

// 创建下载任务并且开启下载，同时返回可选类型的DownloadTask实例，如果url无效，则返回nil
let task = sessionManager.download("http://dldir1.qq.com/qqfile/QQforMac/QQ_V4.2.4.dmg")

// 批量创建下载任务并且开启下载，返回有效url对应的任务数组，urls需要跟fileNames一一对应
let tasks = sessionManager.multiDownload(URLStrings)

let task = sessionManager.download("http://dldir1.qq.com/qqfile/QQforMac/QQ_V4.2.4.dmg")

task?.progress(onMainQueue: true) { (task) in
    let progress = task.progress.fractionCompleted
    print("下载中, 进度：\(progress)")
}.success { (task) in
    print("下载完成")
}.failure { (task) in
    print("下载失败")
}

let URLString = "http://dldir1.qq.com/qqfile/QQforMac/QQ_V4.2.4.dmg"

// 通过 URL 对下载任务进行操作
sessionManager.start(URLString)
sessionManager.suspend(URLString)
sessionManager.cancel(URLString)
sessionManager.remove(URLString, completely: false)

// 直接对下载任务进行操作
sessionManager.start(task)
sessionManager.suspend(task)
sessionManager.cancel(task)
sessionManager.remove(task, completely: false)

let task = sessionManager.download("http://dldir1.qq.com/qqfile/QQforMac/QQ_V4.2.4.dmg")
// 回调闭包可以选择是否在主线程上执行
task?.validateFile(code: "9e2a3650530b563da297c9246acaad5c",
                   type: .md5,
                   onMainQueue: true)
                   { (task) in
    if task.validation == .correct {
        // 文件正确
    } else {
        // 文件错误
    }
}