AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
// 有时候必须得将html类型包含进可请求的类型中
manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/html"];
[manager GET:@"http://c.3g.163.com/nc/article/local/5YyX5Lqs/0-20.html" parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(@"JSON: %@", responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(@"Error: %@", error);
}];