如何取消Alamofire.upload

问题描述

我正在通过 Alamofire.upload 在服务器上上传图像作为多部分数据。与 Alamofire.request 不同，它不会返回 Request 对象，我通常使用该对象来取消请求。

I am uploading images on server via Alamofire.upload as multipart data. Unlike Alamofire.request it's not returning Request object, which I usually use to cancel requests.

但是取消诸如上传之类的消耗性请求是非常合理的。

But it's very reasonable to be able to cancel such a consuming requests like uploading. What are the options for this in Alamofire?

推荐答案

使用示例（自述文件）：

Using the Uploading MultiPartFormData example from the Alamofire README:

Alamofire.upload(
    .POST,
    "https://httpbin.org/post",
    multipartFormData: { multipartFormData in
        multipartFormData.appendBodyPart(fileURL: unicornImageURL, name: "unicorn")
        multipartFormData.appendBodyPart(fileURL: rainbowImageURL, name: "rainbow")
    },
    encodingCompletion: { encodingResult in
        switch encodingResult {
        case .Success(let upload, _, _):
            upload.responseJSON { response in
                debugPrint(response)
            }
        case .Failure(let encodingError):
            print(encodingError)
        }
    }
)

这里， upload.responseJSON 返回一个请求，该请求应允许您将其分配给某些内容以供以后取消。例如：

Here, upload.responseJSON returns a Request, which should allow you to assign it to something for cancellation later. For example:

let request = upload.responseJSON {  ...

...

request.cancel()

这篇关于如何取消Alamofire.upload的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！