Examples of Enums in Swift

SwiftEnums.swift

import SwiftUI

enum Color: Int {
    case red
    case blue
    case yellow
}

enum Decision {
    case yes
    case no
}

enum SheetVisibilityState {
    case showing
    case hidden
}

enum ElementType: String {
    case isScrollView
    case colorContrast
}

enum LoginAPI {
    case login(username: String, password: String)
}

struct ContentView: View {
    @State var color: Color = .blue
    @State var sheetVisibilityState = SheetVisibilityState.hidden
    @State var elementType = ElementType.colorContrast
    @State var api: LoginAPI?
    
    var body: some View {
        VStack {
            Image(systemName: "globe")
                .imageScale(.large)
                .foregroundStyle(.tint)
            Text("Hello, world!")
        }
        .padding()
    }
    
    func dosomething() {
        switch elementType {
        case .isScrollView:
            print("logic for isScrollView")
        case .colorContrast:
            print("logic for colorContrast")
        }
        
        if elementType == .colorContrast {
            
        }
        
        switch api {
        case .login(let name, let password):
            print("Hello \(name), your password is \(password)")
        case nil:
            print("Case nil here because the api property is optional")
        }
    }
}

#Preview {
    ContentView()
}