我需要一些帮助来建立一个类，该类将作为我的应用将使用的所有静态内容的基础，例如州，城市，国家，公司分类等。我不希望它们随着时间的推移而发生变化（否则变化很小）。

作为参考，我现在将考虑国家和城市（所有其他逻辑都相同）

国家/地区：

import UIKit

class Country { 
    var name: String 
    var cities: [City]

    init(name:String,cities:[City]) {
        self.name = name
        self.cities = cities
    }
}

Class City：

import UIKit

class City { 
    var name: String 

    init(name:String) {
        self.name = name
    }
}

在现有代码中，我使用了对这两个类的引用，但我将数据输入了ViewController。

import UIKit

class ViewController: UIViewController,UIPickerViewDelegate,UIPickerViewDataSource {

    @IBOutlet weak var pickerView: UIPickerView!
    @IBOutlet weak var countryLbl: UILabel!

    var countries = [Country]()

    override func viewDidLoad() {
        super.viewDidLoad()
        pickerView.delegate = self
        pickerView.dataSource = self

        // Adding Countries and Cities
        countries.append(Country(name: "UK",cities: [City(name: "London"),City(name: "Manchester"),City(name: "Bristol")]))
        countries.append(Country(name: "USA",cities: [City(name: "New York"),City(name: "Chicago")]))
        countries.append(Country(name: "China",cities: [City(name: "Beijing"),City(name: "Shanghai"),City(name: "Shenzhen"),City(name: "Hong Kong")]))

    }

    func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return 2
    }

    func pickerView(_ pickerView: UIPickerView,numberOfRowsInComponent component: Int) -> Int {
        if component == 0 {
            return countries.count
        } else {
            let selectedCountry = pickerView.selectedRow(inComponent: 0)
            return countries[selectedCountry].cities.count
        }
    }

    func pickerView(_ pickerView: UIPickerView,titleForRow row: Int,forComponent component: Int) -> String? {
        if component == 0 {
             return countries[row].name
         } else {
             let selectedCountry = pickerView.selectedRow(inComponent: 0)
             return countries[selectedCountry].cities[row].name
         }
    }

    func pickerView(_ pickerView: UIPickerView,didSelectRow row: Int,inComponent component: Int) {
        pickerView.reloadAllComponents()

        let selectedCountry = pickerView.selectedRow(inComponent: 0)
        let selectedCity = pickerView.selectedRow(inComponent: 1)
        let cityR = countries[selectedCountry].cities[selectedCity].name

        countryLbl.text = "The right answer was: in \(selectedCountry) in \(cityR)"
    }    
}

为了使代码更整洁，我想将下面的代码移动到另一个类并从ViewController调用它

    // Adding Countries and Cities
    countries.append(Country(name: "UK",City(name: "Bristol")]))
    countries.append(Country(name: "USA",City(name: "Chicago")]))
    countries.append(Country(name: "China",City(name: "Hong Kong")]))

}

被类似

   let countriesAndCities = Dicitionary.getcountriesAndCities
   // Here I would expect countriesAndCities to have the same content as countries.append(...) above.

这可行吗？

谢谢