如何在iOS 7中下载之前查找文件的大小？ [英] How to find size of a file before downloading it in iOS 7?

问题描述

想要在iOS 7中下载文件之前找到某个服务器上的文件大小...我有一个NSURLConnectionDelegate的方法，但是在iOS 4.3之后它已被弃用

Wanted to find size of a file on some server before downloading it in iOS 7... I have a method of NSURLConnectionDelegate but it is deprecated after iOS 4.3

这是方法：

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response

推荐答案

您应该使用 NSURLConnectionDataDelegate 注意：DATADelegate

You should instead use the NSURLConnectionDataDelegate Note: DATADelegate

及其 didReceiveResponse：发送 HEAD请求以获取标题：

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response;

然后你可以通过@Port的建议获得响应大小：

Then you can get the response size with @Port's suggestion:

long long size = [response expectedContentLength];

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