Question

我已经创建了一个User类，并且建议使用字典作为存储机制，以使其更灵活并满足我的需求。请参考此question。

这是我原来的User模型：

final class User: NSObject, ResponseObjectSerializable, ResponseCollectionSerializable {
    let id: Int
    var facebookUID: String?
    var email: String
    var firstName: String
    var lastName: String
    var phone: String?
    var position: String?
    var thumbnail: UIImage?
    var timeCreated: CVDate

    init?(response: NSHTTPURLResponse, var representation: AnyObject) {
        if let dataRepresentation = ((representation as! NSDictionary).valueForKey("data") as? [String: AnyObject]) {
            representation = dataRepresentation
        }

        self.id = representation.valueForKeyPath("id") as! Int
        self.facebookUID = (representation.valueForKeyPath("facebook_UID") as? String)
        self.email = (representation.valueForKeyPath("email") as? String) ?? ""
        self.firstName = (representation.valueForKeyPath("first_name") as? String) ?? ""
        self.lastName = (representation.valueForKeyPath("last_name") as? String) ?? ""
        self.phone = (representation.valueForKeyPath("phone") as? String)
        self.position = (representation.valueForKeyPath("position_name") as? String)
        self.thumbnail = UIImage(named: "ThomasBaldwin")

        if let timeCreated = representation.valueForKeyPath("time_created") as? String {
            let formatter = NSDateFormatter()
            formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
            if let date = formatter.dateFromString(timeCreated) {
                self.timeCreated = CVDate(date: date)
            } else {
                self.timeCreated = CVDate(date: NSDate())
            }
        } else {
            self.timeCreated = CVDate(date: NSDate())
        }
    }

    static func collection(response response: NSHTTPURLResponse, representation: AnyObject) -> [User] {
        var users: [User] = []

        if let dataRepresentation = ((representation as! NSDictionary).valueForKey("data") as? [NSDictionary]) {
            if let dataRepresentation = dataRepresentation as? [[String: AnyObject]] {
                for userRepresentation in dataRepresentation {
                    if let user = User(response: response, representation: userRepresentation) {
                        users.append(user)
                    }
                }
            }
        }

        return users
    }
}

这是我更新的User课程，使用字典作为存储机制：

final class User: NSObject, ResponseObjectSerializable, ResponseCollectionSerializable {

    var properties = NSDictionary()

    init?(response: NSHTTPURLResponse, representation: AnyObject) {
        if let dataRepresentation = ((representation as! NSDictionary).valueForKey("data") as? [String: AnyObject]) {
            properties = dataRepresentation
        }

        properties = representation as! NSDictionary
    }

    static func collection(response response: NSHTTPURLResponse, representation: AnyObject) -> [User] {
        var users: [User] = []

        if let dataRepresentation = ((representation as! NSDictionary).valueForKey("data") as? [NSDictionary]) {
            if let dataRepresentation = dataRepresentation as? [[String: AnyObject]] {
                for userRepresentation in dataRepresentation {
                    if let user = User(response: response, representation: userRepresentation) {
                        users.append(user)
                    }
                }
            }
        }

        return users
    }
}

但是，我想到的问题是，另一个程序员将如何知道他可以从User模型中获取哪些字段，因为我不再单独将它们存储为变量。他们只需检查数据库并查看表的结构吗？

此外，User类的设置方式，它几乎可以成为我从数据库中提取的任何表的模型（因为我现在没有User模型特定的方法）我可以随时拨打user.properties.valueForKeyPath("column_name")表格。

如果我将模型名称更改为更广泛的名称，并将其重新用于我将从中提取数据的表格，那么这是一种干净的做法吗？我不需要任何特定于模型的方法？< / p>

Answer 1

我倾向于将自定义数据对象更喜欢字典。自定义数据对象具有特定的具体类型的命名字段。它是自我记录的，当你使用它时，你可以假设它具有你期望的属性，并且它们是正确的类型。使用词典你也不能假设（好吧，使用Swift词典你可以强制输入，但是你不能混合使用不同类型的属性，比如名字字符串和数字工资值）

斯威夫特模型的最佳实践

1 个答案: