iOS开发之文件（分段）下载
2015-08-31 21:24:26

1、HTTP HEAD方法NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:0 timeoutInterval:kTimeout];request.HTTPMethod = @"HEAD";[NSURLConnection sendAsynchronousRequest:request queue:self.myQueue completionHandler:^(NSURLResponse *response, NSData *data, NSError *connec ......

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