objective-c - 无法获取 HTML 代码 AFNetworking 2.0

Question

我尝试做出 GET HTTP 响应。我需要获取html代码以供后续解析，但responseObject为nil。

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/html"];

[manager GET:@"http://www.example.com/" parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
    NSError *error;
    HTMLParser *parser = [[HTMLParser alloc] initWithString:responseObject error:&error];       
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    NSLog(@"Error: %@", error);
}];

Answer 1

为了获取 html 代码，我们需要构建一个自定义响应序列化器，将来自 Web 服务器的 NSData 响应解码为 NSString。我们需要继承 AFHTTPResponseSerializer 并实现以下方法:

- (id)responseObjectForResponse:(NSURLResponse *)response
                           data:(NSData *)data 
                          error:(NSError *__autoreleasing *)error
{
    return [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
}