objective-c - NSURLConnection 连接 : didReceiveData: is not called after redirect

Question

我正在启动一个请求，该请求返回带有重定向的 HTML。为什么 didReceiveData 函数没有被调用第二次？我正在尝试下载一个 JSON 文件。 (使用 iOS6)

    - (void) testdownload{
        NSURL *url = [NSURL URLWithString:@"https://***];
        NSURLRequest *request = [NSURLRequest requestWithURL:url];
        NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
        [connection start];
    }

    - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)d{

        NSString *tmpdata = [[NSString alloc] initWithData:d encoding:NSUTF8StringEncoding];
        NSLog(@"data: %@", tmpdata);
    }

当我使用 UIWebView 时，将处理重定向并显示 JSON 文件。玩这个功能没用:

- (NSURLRequest *)connection:(NSURLConnection *)connection willSendRequest:(NSURLRequest *)request redirectResponse:(NSURLResponse *)redirectResponse{
    return request;
}

Answer 1

尝试改用这段代码:

- (NSURLRequest *)connection: (NSURLConnection *)inConnection
             willSendRequest: (NSURLRequest *)inRequest
            redirectResponse: (NSURLResponse *)inRedirectResponse;
{
    if (inRedirectResponse) {
        NSMutableURLRequest *r = [[request mutableCopy] autorelease]; // original request
        [r setURL: [inRequest URL]];
        return r;
    } else {
        return inRequest;
    }
}

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