Hi. I found this info on Expanding Lists super helpful!

https://www.hackingwithswift.com/quick-start/swiftui/how-to-create-expanding-lists

But I need to assistance on how/if I can format certain elements of the list. Here's the code from the page above.

struct Bookmark: Identifiable {
    let id = UUID()
    let name: String
    let icon: String
    var items: [Bookmark]?

    // some example websites
    static let apple = Bookmark(name: "Apple", icon: "1.circle")
    static let bbc = Bookmark(name: "BBC", icon: "square.and.pencil")
    static let swift = Bookmark(name: "Swift", icon: "bolt.fill")
    static let twitter = Bookmark(name: "Twitter", icon: "mic")

    // some example groups
    static let example1 = Bookmark(name: "Favorites", icon: "star", items: [Bookmark.apple, Bookmark.bbc, Bookmark.swift, Bookmark.twitter])
    static let example2 = Bookmark(name: "Recent", icon: "timer", items: [Bookmark.apple, Bookmark.bbc, Bookmark.swift, Bookmark.twitter])
    static let example3 = Bookmark(name: "Recommended", icon: "hand.thumbsup", items: [Bookmark.apple, Bookmark.bbc, Bookmark.swift, Bookmark.twitter])
}

struct ContentView: View {
    let items: [Bookmark] = [.example1, .example2, .example3]

    var body: some View {
        List(items, children: \.items) { row in
            HStack {
                Image(systemName: row.icon)
                Text(row.name)
            }
        }
    }
}

Here's what I would like to do

1. I would like to 'star' icon and the 'favorites' to be of a specified color.
2. I would like the list elements, Apple, BBC etc.... to be of a specified color (which may be different to 1 above).

Any advice, is this possible?

Thank you for any advice!!

edit: I might also want the 'favorites' to use a different font to the items in the list. :)

@flaneur creates a Bookmark struct then asks:

I would like the list elements, Apple, BBC etc.... to be of a specified color
Thank you for any advice!!

I think you are saying you have an incomplete definition?

Why not add a color variable to your struct?

struct Bookmark: Identifiable {
    let id =         UUID()
    let name:        String
    let icon:        String
    var items:       [Bookmark]?
    var markColor =  Color.indigo // <-- sensible default value

    // Give each bookmark a color
    static let apple = Bookmark(name: "Apple", icon: "1.circle", markColor: .blue.opacity(0.4) ) 

Then when you display your Bookmark in a List view, you can specify the foreground, or background color using the Bookmark's markColor variable.

// Display a bookmark
Text("\(aBookmark.name) ).foregroundColor( aBookmark.markColor )

Thank you, that worked a treat :)

if I may ask a final related question?

Here is an example of of of the element of the list

    static let visits = Bookmark(name: "Visits:", currency: "", kpiValue: "\(AnalyticsData.Visits[0])", icon: "figure.walk.motion")

The variable AnalyticsData.Visits is an integer. And I want to format it i.e. 123456999 = 123,456,999. How can I define the number formatting? I tired to used a number formatter in the definition of 'visits' but that didn't work.

@flaneur has a number of questions. One is about numbers:

I want to format an integer 123456999 to appear as 123,456,999

One thing to remember about number formatting. You are NOT formatting a number. Instead think in a way such that you are creating a string version of your integer, with a user defined format.

Your request is probaly the most common, so I think it's a default.

Did you try this in Playgrounds?

// Run this line in Playgrounds. 
1232343450.formatted() // <-- No other magic required
// For me this returns 1,232,232,450    // <-- This is what you require?

let myAnalysisValue = 12345
print( myAnalysisValue.formatted() )  // <-- Give this a go!

huh, I understand. Thank you will try this!