object list always print nil in swift - ios

Question

In my object Dish xxx.Dish, I want to access the Choice class price and name to display but I failed. dish data load from web API and I tested data loaded success full and put the data to the object dish and it return the object list to viewcontroller to load tableview.
Output of printed console
Optional([xxx.Dish, xxx.Dish])
and in the dish class before append optionList?.append(_obj)
xxx.DishOption
Anyone helps me how can I do that .. I am new to swift and is it right way to implement? Please suggest me?
class Dish {
let dishId : String
var optionList : [DishOption]?
init?(fromAPIResponse resposne : Dictionary<String,AnyObject>) {
guard let dishId = resposne["dishId"] as? String else {
return nil
}
self.dishId = dishId
if let objs = resposne["options"] as? [[String: AnyObject]]{
for obj in objs {
if let _obj = DishOption(fromAPIResponse: obj){
optionList?.append(_obj)
}
}
}
}
class DishOption {
let optionId : String
var choiceList : [Choice]?
init?(fromAPIResponse resposne : Dictionary<String,AnyObject>) {
guard let optionId = resposne["optionId"] as? String else {
return nil
}
self.optionId = optionId
if let objs = resposne["choices"] as? [[String: AnyObject]]{
for obj in objs {
if let _obj = Choice(fromAPIResponse: obj){
choiceList?.append(_obj)
}
}
}
}
}
class Choice{
let choiceId : String
let name : String
let price : String
init?(fromAPIResponse resposne : Dictionary<String,AnyObject>) {
guard let choiceId = resposne["choiceId"] as? String ,
let name = resposne["name"] as? String,
let price = resposne["price"] as? String else {
return nil
}
self.choiceId = choiceId
self.name = name
self.price = price
}
}
UPDATE:
var dishMenuList = [Dish]()
guard let objs = json["menu_list"] as? [[String : AnyObject]] else {
return
}
for obj in objs {
if let _obj = Dish(fromAPIResponse: obj){
print(_obj.optionList) //always print nil
if let options = _obj.optionList {
for data in options {
print(data.displayAsButton)
}
}
dishMenuList.append(_obj)
}
}

Answer 1

From what I can see, you are never initializing both the optionList and choiceList arrays. It would be better to initialize them as empty arrays:
class Dish {
let dishId : String
var optionList = [DishOption]()
...
optionList.append(_obj)
This is the reason that you cannot see any options. Since the optionList is still nil, the line optionList?.append(_obj) does not execute.