Nested repeatative loop in swift

I am trying to parse a nested iterative loop in swift I am getting the response from web service in the following format

{
    "categories": [{
        "name": "Default Category",
        "id": "default_category",
        "children": [{
            "uuid": "783f491fef5041438fb7a2c3bf6a3650",
            "name": "Accessories",
            "children": [{
                "uuid": "d21b4491ff784a9bae88de279b99fac3",
                "name": "All Accessories",
                "children": [{
                        "uuid": "2b1a23c4107844ad8a7afc1b324d0ffd",
                        "name": "Belts",
                        "children": [{
                                "uuid": "2b1a23c4107844ad8a7afc1b324d0ffd",
                                "name": "Belts",
                                "children": []

                            },
                            {
                                "uuid": "2b1a23c4107844ad8a7afc1b324d0ffd",
                                "name": "Belts",
                                "children": []
                            }
                        ]
                    },
                    {
                        "uuid": "a1c2a64c36c2461cad3d5f850e4fd0f5",
                        "name": "Hats",
                        "children": []
                    },
                    {
                        "uuid": "8f26bc764b8342feaa0cb7f3b96adcae",
                        "name": "Scarves",
                        "children": []
                    },
                    {
                        "uuid": "aa1116d1a0254ecea836cc6b32eeb9e0",
                        "name": "Sunglasses",
                        "children": []
                    },
                    {
                        "uuid": "9d7033233e8f47eaa69eb1aaf2e98cdd",
                        "name": "Watches",
                        "children": []
                    }
                ]
            }]
        }],
        "uuid": "6a23415771064e7aaad59f84f8113561"
    }]
}

Inside, the categories, there is 'children' key which in turn can contain another children and so on. I want to continuously loop inside the children key until the children key is empty and insert the last child into database.

Following is the code which i have done

     for currentCategory in mainCategories {


    guard against if there are child categories
            guard var children = currentCategory.children, children.count > 0 else {
                //  Save the context
                self.coreData.saveStore()
                continue
            }                    
            for thisChildCategory in children {

                if thisChildCategory.children?.count > 0 {
                    for innerChildCategory in thisChildCategory.children! {
                        print("innerChildCategory name \(String(describing: innerChildCategory.name))")
                    }
                }

                if let child = thisChildCategory.children {
                    children = child
                }

                //  Create new object
                if let currentChildCategory  = self.coreData.insertNewObject(CoreDataEntities.BijouCategories.rawValue,
                    keyValues: ["id" : thisChildCategory.id! as Optional<AnyObject>,
                        "uuid" : thisChildCategory.uuid as Optional<AnyObject>,
                        "name" : thisChildCategory.name! as Optional<AnyObject>,
                        "gender" : thisChildCategory.gender as Optional<AnyObject>!,
                        "active" : NSNumber(value: false)]) as? BijouCategories {

                    //  Set as parent category
                    currentChildCategory.parentCategory = parentCategory


                    //  Save the context
                    self.coreData.saveStore()

                }
            }

        }

But this is not saving all the last child category in database.

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