Swift 子类化后查询无法转化成子类对象

        let query = LCQuery(className: "UserInfo"+phone)
        _ = query.getFirst { [weak self] result in
            guard let `self` = self else{return}
            switch result {
            case .success(object: let todo):
                
                if let userIn = todo as? UserInfoObject {
                    log.debug("\(String(describing: userIn.nickName))")
                }

这时候if语句不执行