[英]Archiving Custom Object in Swift - Extended
I am working on an iOS App on Swift 4.0. 我正在使用Swift 4.0上的iOS应用程序。 The app uses an 3rd party SDK where there is a model lets say,
该应用使用第三方软件开发工具包,其中有一个模型可以说,
class Customer: NSCopying, NSObject {
var name: String!
var age: Int!
var address: Address!
}
At that point I have no control to modify any properties and signature for the model as its inside SDK. 那时,我无法控制将模型的任何属性和签名修改为内部SDK。 But I need to store the object in disk/user defaults and load when needed.
但是我需要将对象存储在磁盘/用户默认值中,并在需要时加载。
Is it possible? 可能吗? If it is then how can I do that?
如果是,那我该怎么办?
One way is to use SwiftyJSON to convert the model object to JSON data: 一种方法是使用SwiftyJSON将模型对象转换为JSON数据:
extension Customer {
func toJSON() -> JSON {
return [
"name": name
"age": age
"address": address.toJSON() // add a toJSON method the same way in an Address extension
]
}
static func fromJSON(_ json: JSON) -> Customer {
let customer = Customer()
customer.name = json["name"].string
customer.age = json["age"].int
customer.address = Address.fromJSON(json["address"]) // add a fromJSON method the same way
}
}
Now you can do something like saving to UserDefaults
现在,您可以执行类似保存到
UserDefaults
UserDefaults.standard.set(try! Customer().toJSON().rawData(), forKey: "my key")
let customer = Customer.fromJSON(JSON(data: UserDefaults.standard.data(forKey: "my key")!))
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