Reading an array from another Class - arrays

Question

I have a Class on a Theme.swift called Themes file which basically defines some types of Strings, and set different colours and font types.
On another file, called Contents.swift I have another class called Contents, and some arrays, like this:
class Contents: Themes {
let navContent = [
LabelContent(text: "NAV IDENT", theme: .menuOption),
LabelContent(text: "WPT LIST", theme: .menuOption)
]
}
The question is:
How can I use this navContent array in AppDelegate? It's not global yet I think.

Answer 1

If you don't want to create an instance of the class Contents and then get its properties, then make those properties static (or Type Properties):
class Contents: Themes {
static let navContent = [
LabelContent(text: "NAV IDENT", theme: .menuOption),
LabelContent(text: "WPT LIST", theme: .menuOption)
]
}
And you could access them like so:
print(Contents.navContent[0])
Here is a brief description of Type Properties from the documentation:
You can define properties that belong to the type itself, not to any one instance of that type. There will only ever be one copy of these properties, no matter how many instances of that type you create. These kinds of properties are called type properties.

Answer 2

if it's a member variable of the Contents class as you have it there, you need to create an instance of Contents, then access it from the instance
let instance = Contents()
instance.navContent // access it this way
if you dont want to create an instance everytime you need to access it, then you can make it into static class variable
class Contents: Themes {
static let navContent = [
LabelContent(text: "NAV IDENT", theme: .menuOption),
LabelContent(text: "WPT LIST", theme: .menuOption)
]
}
Contents.navContent // access it this way
if you need polymorphism on that variable, you can use the 'class' keyword on the variable and you can override it on the child class (but it needs to be a computed variable). you access it the same way as static class variable
class Contents: Themes {
class var navContent: [LabelContent] {
return [LabelContent(text: "NAV IDENT", theme: .menuOption)]
}
}
class OtherContents: Contents {
override class var navContent: [LabelContent] {
return [LabelContent(text: "WPT LIST", theme: .menuOption)]
}
}
Contents.navContent // access "NAV IDENT"
OtherContents.navContent // access "WPT LIST"