How to present JSON array in UIPickerView in alphabetical order?

I have a UIPickerView that gets data from JSON and presents it in two columns, one that shows two columns, producer and product using the following:

if let url = URL(string: "https://www.example.com/example"),
                let data = try? Data(contentsOf: url),
                let tmpValues = try? JSONSerialization.jsonObject(with: data, options: .mutableContainers) as? [[String:String]] {
                let tempCategories = tmpValues?.reduce(into: [String:[String]](), { (dict, value) in
                    if let producer = value["producer"], let product = value["product"] {
                        dict[producer, default:[]].append(product)
                    }
                })
                for category in (tempCategories ?? [:]) {
                    allCategories.append(Category(name: category.key, items: category.value))
                }
                pickerView.reloadAllComponents()
            }

The issue is while the JSON presents the array in alphabetical order, the PickerView presents the array in random orders every time it is opened, how can this be fixed.