将表视图数据保存在Swift MVC（Swift）中

Question

How save tableview data in swift MVC?

How can i save data in table on another ViewController?

I have a custom class called ToDoItem.

func save() {
    let encodedData: Data = NSKeyedArchiver.archivedData(withRootObject: ToDoItem.self)
    UserDefaults.standard.set(encodedData, forKey: "todosave")
    UserDefaults.standard.synchronize()
}
//
func load() {
    if let decoded = UserDefaults.standard.object(forKey: "todosave") {
        let _ = NSKeyedUnarchiver.unarchiveObject(with: decoded as! Data) as! [ToDoItem]
    }
}

I've tried saving it with NSUserDefaults but I get an error.

ToDoItem.swift

import Foundation

class ToDoItem: NSObject, NSCoding {

  var id: String
  var image: String
  var title: String
  var date: Date
   init(id: String, image: String, title: String, date: Date) {
     self.id = id
     self.image = image
     self.title = title
     self.date = date
   }

   required convenience init(coder aDecoder: NSCoder) {
     let id = aDecoder.decodeObject(forKey: "id") as! String
     let image = aDecoder.decodeObject(forKey: "image") as! String
     let title = aDecoder.decodeObject(forKey: "title") as! String
     let date = aDecoder.decodeObject(forKey: "date") as! Date
     self.init(id: id, image: image, title: title, date: date)
   }

   func encode(with aCoder: NSCoder) {
     aCoder.encode(id, forKey: "id")
     aCoder.encode(image, forKey: "image")
     aCoder.encode(title, forKey: "title")
     aCoder.encode(date, forKey: "date")
  }
}

Answer 1

I would suggest using Object Mapper and then you can convert the object to JSON, after convert you save it to User Defaults as normally with type Any. Then for loading data, you map the data from the User Defaults key that you saved before to your TODOItem.

The link for ObjectMapper: https://github.com/Hearst-DD/ObjectMapper Also you can use this library for mapping different JSONs to your desired objects