Alamofire5.2.2 下载文件带进度

直接看代码

以 下载百度图片为例

        let url: String = "https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1607076334355&di=f21df7765a2baca90d61920261361190&imgtype=0&src=http%3A%2F%2Fattachments.gfan.com%2Fforum%2F201503%2F19%2F211608ztcq7higicydxhsy.jpg"

       //指定位置，且删除已存在的该文件
        let dest: DownloadRequest.Destination = { _, _ in
            let documentsURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0]
            let fileURL = documentsURL.appendingPathComponent("mm.png")

            return (fileURL, [.removePreviousFile, .createIntermediateDirectories])
        }
//开始下载
        AF.download(url, interceptor: nil, to: dest).downloadProgress(closure: { (progress) in
            
            debugPrint("-------下载进度: \(progress.fractionCompleted)")
        }).responseData { (res) in
            if let data = res.value {
              //显示图片
                let image = UIImage(data: data)
                self.imgGif.image = image
            }
        }