Error Domain=NSCocoaErrorDomain Code=3840解决方法

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    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];    manager.responseSerializer = [AFJSONResponseSerializer serializerWithReadingOptions:NSJSONReadingAllowFragments];    [manager GET:url parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {                NSData *data = [responseObject dataUsingEncoding:NSUTF8StringEncoding];        NSMutableArray *array = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:nil];                NSMutableArray *results = [[NSMutableArray alloc] init];        [array enumerateObjectsUsingBlock:^(NSDictionary *obj, NSUInteger idx, BOOL *stop) {                        Model *model = [[Model alloc] initWithDic:obj];            [results addObject:model];        }];                if (block) {            block(results, nil);        }            } failure:^(AFHTTPRequestOperation *operation, NSError *error) {        NSLog(@"%@", error);    }];

原因是接收的数据并不是标准的json数据

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