为什么我更喜欢ASIHTTPRequest而不是NSURLConnection从网上下载文件？ [英] Why should I prefer ASIHTTPRequest over NSURLConnection for downloading files from the web?

问题描述

我见过几次使用ASIHTTPRequest下载文件的人。现在我想知道为什么？与NSURLConnection相比有哪些核心优势？

I've seen a couple of times people using ASIHTTPRequest to download files. Now I wonder why? What are the core benefits over NSURLConnection?

推荐答案

有几个原因。在我看来，这些是主要的：

There are several reasons. In my mind these are the major ones:

1. ASIHTTPRequest 允许为每个请求指定一个委托（相对于整个 NSURLConnection 的一个委托）;这很有用，因为一旦获得了等待的数据，每个请求原则上都有不同的处理;

1. ASIHTTPRequest allows to specify a delegate for each request (vs. one delegate for a whole NSURLConnection); this is useful because each request has in principle a different processing once you get the data you were waiting for;

ASIHTTPRequest 支持一种缓存机制，可以让您的应用程序在离线时很容易工作（并显示缓存的数据）;在NSURLRequest中没有这样的机制;

ASIHTTPRequest supports a caching mechanism that make very easy to make your app working when offline (and showing the cached data); no such mechanism in NSURLRequest;

如果你搜索stackoverflow，你会发现许多提示非常奇怪的内存泄漏， NSURLConnection / NSURLRequest 挑衅; ASIHTTRequest ;

If you search stackoverflow, you will find many hints at a very strange memory leak that NSURLConnection/NSURLRequest provoke; this is not experienced with ASIHTTRequest;

ASIHTTRequest 提供更好的可达性实现，这是绝对必要的;苹果提供的一个是据说是有缺陷的。

ASIHTTRequest offers a better implementation of Reachability, which is absolutely necessary; the Apple provided one is said to be buggy.

希望这有帮助。

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