我有一个AFNetworking的Get请求，代码是:NSString*url=/*url*/;AFHTTPRequestOperationManager*manager=[AFHTTPRequestOperationManagermanager];manager.responseSerializer.acceptableContentTypes=[NSSetsetWithObjects:@"text/html",nil];[managerGET:urlMessageparameters:nilsuccess:^(AFHTTPRequestOperation*operation,idr