Swift Enumerations to SwiftUI list view

EnumListView.swift

struct EnumListView<Enum: RawRepresentable &
                        CaseIterable &
                        CustomStringConvertible> : View where
    Enum.RawValue: Hashable,
    Enum.AllCases: RandomAccessCollection {
    
    var title: String = ""
    @Binding var selectedItem: Enum?
    
    var body: some View {
        NavigationView {
            List {
                ForEach(Enum.allCases, id: \.rawValue) { (status) in
                    Button(action: {
                        selectedItem = Enum(rawValue: status.rawValue)!
                    }, label: {
                        HStack {
                            Text(status.description)
                            Spacer()
                            if selectedItem != nil && selectedItem! == status {
                                Image(systemName: "checkmark")
                            }
                        }
                    })
                }
            }
            .navigationBarTitle(LocalizedStringKey(title))
        }
    }
}


struct EnumListView_Previews: PreviewProvider {
    enum MugiwaraPirates: String, CaseIterable, CustomStringConvertible {
        case luffy
        case zoro
        case sanji
        case jinbei
        case franky
        case nami
        case robin
        case chopper
        case brook
        case usopp
        
        var description: String {
            return self.rawValue.capitalized
        }
    }
    
    enum PiratesBounty: Int, CaseIterable, CustomStringConvertible {
        case luffy = 1500000000
        case blackbeard = 2247600000
        case shanks = 4048900000
        case bigMom = 4388000000
        case kaido = 4611100000
        case whitebeard = 5046000000
        case roger = 5564800000
        
        var name: String {
            switch self {
            case .luffy:
                return "Luffy"
            case .blackbeard:
                return "Blackbeard"
            case .shanks:
                return "Shanks"
            case .bigMom:
                return "Big Mom"
            case .kaido:
                return "Kaido"
            case .whitebeard:
                return "White Beard"
            case .roger:
                return "Gol D. Roger"
            }
        }
        
        var description: String {
            let formatter = NumberFormatter()
            formatter.numberStyle = .decimal
            let value = formatter.string(from: NSNumber(value: self.rawValue))!
            
            return "\(self.name): \(value) Berries"
        }
    }
    
    static var previews: some View {
        Group {
            EnumListView<PiratesBounty>(title: "Bounties", selectedItem: .constant(.luffy))
            EnumListView<MugiwaraPirates>(title: "Mugiwara Pirates", selectedItem: .constant(.luffy))
        }
    }
}