A SwiftUI View used to display strings with subscripted text

SubscriptedTextView

import SwiftUI

struct SubscriptedTextView: View {
    
    // MARK: Properties
    
    let abbreviation: String
    
    var body: some View {
        subscriptedText()
    }
    
    // MARK: Helpers
    
    private func subscriptedText() -> Text {
        let mainFont = Font.body
        var texts = [Text]()
        abbreviation.forEach { character in
            let characterString = String(character)
            if let _ = Int(characterString) {
                let subscriptText = Text(characterString).font(.caption2).baselineOffset(UIFont.preferredFont(forTextStyle: .body).pointSize / -4)
                texts.append(subscriptText)
            } else {
                let normalText = Text(characterString).font(mainFont)
                texts.append(normalText)
            }
        }
        return texts.reduce(Text(""), +)
    }
    
}

struct ParameterAbbreviationView_Previews: PreviewProvider {
    
    static var previews: some View {
        Group {
            ParameterAbbreviationView(abbreviation: "Ca")
            ParameterAbbreviationView(abbreviation: "PO4")
            ParameterAbbreviationView(abbreviation: "H2PO4")
        }
        .previewLayout(.sizeThatFits)
    }
    
}