Adding elements to array from another class - ios

Question

So I have this class in City.swift:
class City {
class Entry {
let name : String
init(name : String) {
self.name = name
}
}
let cities = []
}
And in another file I want to add to an array like this:
var city = City()
city.cities = City(name: "Test")
And I want to be able to call it by indexPath.row number (because I am using it in cellForRowAtIndexPath) like this:
let entry: AnyObject = city.cities[indexPath.row]
println(entry.name as String)
How could I make this code work?

Answer 1

First of all, a few comments.
There is no need for nested classes or even a custom class at all
Just use an array of Strings
add to array like this : array.append(Item)
Do not initialise as AnyObject in a language that is aware of types. (let entry: AnyObject = city.cities[indexPath.row])
In your example you have a collection of Strings so I would just use this:
var cities : [String] = []
cities.append("NY")
let city = cities[0] // NY
You also stated that you have a part of your code in a different file. I am assuming you want to have a method for fetching and storing the values. And a separate method to display them?
I would propose making two classes if you want to handle more than just a City Name and want to have access to the fetched data anywhere in your app.
Google Singleton for more info on how this works.
class City {
var name : String = ""
var geoLocation : CLLocationCoordinate2D?
// more attributes of your city object
init(name name_I: String) {
self.name = name_I
}
}
class Locations {
// the static part is shared between all instances of the Locations Class -> Google Singleton
static var cachedLocations : Locations = Locations()
var cities : [City] = []
init() {
}
}
// add a new city
let newCity = City(name: "NY")
Locations.cachedLocations.cities.append(newCity)
// in another class / file / viewcontroller ,.... get the cached city
let cachedCity = Locations.cachedLocations.cities[0]
You could add a class function to Locations to convert between a Dictionary and the City class. How to get a Dictionary from JSON
// class function is available without needing to initialise an instance of the class.
class func addCachedCity(dictionary:[String:AnyObject]) {
guard let cityName = dictionary["name"] as? String else {
return
}
let newCity = City(name: cityName)
cachedLocations.cities.append(newCity)
}
This would be used like this:
let cityDict : [String:AnyObject] = ["name":"LA"]
Locations.addCachedCity(cityDict)
Locations.cachedLocations.cities // now holds NY and LA

Answer 2

You could simply make your array an global array. You only have to define
your array out of the class. And then use the .append() function
let cities = []
class City {
class Entry {
let name : String
init(name : String) {
self.name = name
}
}
}