Swift: create two objects each of them inside another

Question

I developed an iOS app which have two objects, each of one inside another, as below: first one:

class OfferItem
 {
var _id : Int? = 0
var _OfferId : Int? = 0
var _ItemId : Int? = 0
var _Discount : Int? = 0
var _item = Item()
..
functions()
}

and 2nd one:

    class Item
    {

        var _id : Int! = 0
        var _RateCount : Int? = 0   
        var _Offer = OfferItem() 
         ..
    functions()
}

How to resolve that in such away where I can call each object in another?

Answer 1

You must read about references in Swift. Automatic Reference Counting link

Here is your example:

class OfferItem {
  var id: Int?
  var discount: Int?
  var item: Item!

  init(id: Int? = nil, discount: Int? = nil, itemId: Int, itemRateCount: Int) {
    self.id = id
    self.discount = discount
    self.item = Item(id: itemId, rateCount: itemRateCount, offer: self)
  }

}


class Item {
  var id = 0
  var rateCount = 0
  unowned var offer: OfferItem

  init(id: Int, rateCount: Int, offer: OfferItem) {
    self.id = id
    self.rateCount = rateCount
    self.offer = offer
  }
}


var offerItem = OfferItem(id: 10, discount: 2, itemId: 1, itemRateCount: 20)

print(offerItem.item.id, offerItem.item.offer.id)

Result: 1 Optional(10)

I hope to help you with my answer above!