Right way to implement deep copy for object which contains nested objects in Swift?

Question

I am trying to get deep copy of an class object which contains nested object in swift, Can anyone help ?

Code which I tried

Here is my class:

class ZLFilters: NSObject, NSCopying {

var filterChoices   : [ZLFilterChoice]?


required init(_ map: Map){

}

init(filterChoices : [ZLFilterChoice]) {

    self.filterChoices = filterChoices
}

func copyWithZone(zone: NSZone) -> AnyObject {

    let copy = ZLFilters(filterChoices: filterChoices!)
    return copy
  }
}

But the problem is filterChoices is itself an object, so again internally it does not do deep copy.

http://stackoverflow.com/questions/25808972/how-to-implement-copy-constructor-in-swift-subclass — Artem Zaytsev, Dec 26 '16 at 10:06
Write the code for each property. If you have written anything do share your code we can help you in that — Inder Kumar Rathore, Dec 26 '16 at 10:06
Possible duplicate of [How to do "Deep Copy" in Swift?](http://stackoverflow.com/questions/24754559/how-to-do-deep-copy-in-swift) — Ahmad F, Dec 26 '16 at 10:10

score 2 · Accepted Answer · answered Dec 26 '16 at 10:18

2

Assuming your filter choice also conforms:

let copy = ZLFilters(filterChoices: filterChoices!.copyWithZone(zone))

answered Dec 26 '16 at 10:18

Wain

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var filterChoices : [ZLFilterChoice]?, As filterchoices is an array of ZLFilterChoice, so I can't call copyWithZone(zone) on filterChoices(array) object. – Ajay Kumar Dec 26 '16 at 11:00

Right way to implement deep copy for object which contains nested objects in Swift?

1 Answers1