链接多个 Alamofire 请求

本文介绍了链接多个 Alamofire 请求的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在寻找一种可以链接多个 HTTP 请求的良好模式.我想使用 Swift，最好是 Alamofire.

I'm looking for a good pattern with which I can chain multiple HTTP requests. I want to use Swift, and preferrably Alamofire.

比如说，我想做以下事情:

Say, for example, I want to do the following:

发出 PUT 请求

发出 GET 请求

用数据重新加载表格

promises 的概念似乎很适合这种情况.如果我可以做这样的事情，PromiseKit 可能是一个不错的选择:

It seems that the concept of promises may be a good fit for this. PromiseKit could be a good option if I could do something like this:

NSURLConnection.promise( Alamofire.request( Router.Put(url: "httbin/put") ) ).then { (request, response, data, error) in Alamofire.request( Router.Get(url: "httbin/get") ) }.then { (request, response, data, error) in // Process data }.then { () -> () in // Reload table }

但那是不可能的，或者至少我不知道.

but that's not possible or at least I'm not aware of it.

如何在不嵌套多个方法的情况下实现此功能?

How can I achieve this functionality without nesting multiple methods?

我是 iOS 新手，所以也许我缺少一些更基本的东西.我在Android等其他框架中所做的是在后台进程中执行这些操作并使请求同步.但是Alamofire 本质上是异步的，所以这种模式不是一种选择.

I'm new to iOS so maybe there's something more fundamental that I'm missing. What I've done in other frameworks such as Android is to perform these operations in a background process and make the requests synchronous. But Alamofire is inherently asynchronous, so that pattern is not an option.

推荐答案

在 Promise 中包装其他异步内容的工作方式如下:

Wrapping other asynchronous stuff in promises works like this:

func myThingy() -> Promise<AnyObject> { return Promise{ fulfill, reject in Alamofire.request(.GET, "httpbin/get", parameters: ["foo": "bar"]).response { (_, _, data, error) in if error == nil { fulfill(data) } else { reject(error) } } } }

现在，使用:github/PromiseKit/Alamofire-