Swift 3 Alamofire 请求进度

Question

我有这种代码

let req = Alamofire.request(url, method: .post, parameters: parameters, encoding: JSONEncoding.default, headers: headers)
    req.downloadProgress { (progress) in
        print("progess!", Float(req.progress.fractionCompleted))
    }

    req.responseJSON { response in
        if response.result.isSuccess {
            print(response.result.value!)
        }
        else {
            print(response.result.error!)
        }
    }

结果并没有给我带来进步。它只返回 1.0，仅此而已，但我需要此请求的进度。

请有人帮助我。

Answer 1

你在使用 req.progress.fractionCompleted 时犯了一个错误。使用 progress.fractionCompleted 代替。

let req = Alamofire.request(url, method: .post, parameters: parameters, encoding: JSONEncoding.default, headers: headers)
    req.downloadProgress { (progress) in
        print("progess!", Float(progress.fractionCompleted))
    }

    req.responseJSON { response in
        if response.result.isSuccess {
            print(response.result.value!)
        }
        else {
            print(response.result.error!)
        }
    }