iOS开发之swift网络请求框架Alamofire iOS开发之swift网络请求框架Al

【iOS开发之swift网络请求框架Alamofire】1.下载文件显示进度
A.任何DownloadRequest都可以使用downloadProgress API得到下载进度。

Alamofire.download("https://httpbin.org/image/png") .downloadProgress { progress in print("Download Progress: \(progress.fractionCompleted)") } .responseData { response in if let data = response.result.value { let image = UIImage(data: data) } }

B.queue参数定义了下载进度闭包在哪个DispatchQueue调用。

let utilityQueue = DispatchQueue.global(qos: .utility)Alamofire.download("https://httpbin.org/image/png") .downloadProgress(queue: utilityQueue) { progress in print("Download Progress: \(progress.fractionCompleted)") } .responseData { response in if let data = response.result.value { let image = UIImage(data: data) } }