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Guide

SwiftUI

Build a Wii app from SwiftUI-style views.

How it works

Choose Swift: SwiftUI app when you create a project. You write a View with a body, like on the Mac. Revolution Editor translates it to C and draws the view tree every frame, so @State changes show straight away.

Example

import SwiftUI

@main
struct CounterApp: App {
    var body: some Scene {
        WindowGroup { ContentView() }
    }
}

struct ContentView: View {
    @State private var count = 0
    @State private var on = true

    var body: some View {
        VStack(spacing: 16) {
            Text("Count: \(count)").font(.title)
            Button("Add") { count += 1 }
            Toggle("Sound", isOn: $on)
        }
        .padding(24)
    }
}
A SwiftUI app drawn on a Wii screen: a title, a counter, a toggle and a list
The SwiftUI template. This frame is drawn by the same code the Wii runs, in a Mac test harness.

Views and modifiers

  • Text, Image, VStack, HStack, ZStack, Spacer, Divider, Group, ForEach, Button, Toggle, Slider, ProgressView, and the shapes Rectangle, RoundedRectangle, Circle, Capsule.
  • padding, frame, background, foregroundColor, font, opacity, offset, cornerRadius, border, onTapGesture, onAppear, disabled, plus position, underline, shadow (a simple offset shadow), clipShape (rounded shapes become rounded corners), overlay (a colour), onLongPressGesture (hold A), task and onChange(of:).
  • @State and @Binding ($value). Your own views can take parameters and bindings.
  • Every other SwiftUI modifier is accepted so your code builds, and ignored when it has no meaning on a Wii: text styling such as bold and italic, animation and transitions, accessibility, keyboard and hover, lists and scrolling, navigation, toolbars, sheets and alerts, the environment, and the watchOS/macOS/tvOS-only ones (digitalCrownRotation, containerBackground, onExitCommand, menuBarExtraStyle, statusBar, defersSystemGestures).

On the Wii, point and press A to click. The D-pad moves a focus ring.

What doesn't

NavigationStack, List scrolling, gestures other than tap and long press, @Observable models, Combine and animation. Use plain Swift types and ForEach instead.

← SwiftUI designer →