Write iOS Game Once and Play in Any Way

Write iOS Game Once and Play in Any Way by UJ Cheng @ try! Swift Tokyo 2025
https://youtu.be/cJ4ozf762kA

Transcript

1. Write iOS Game Once and Play in Any Way Follow 「iamhands0me」on U. J. Cheng, Advanced Software Engineer @
2. GameView()
3. GameView(force: $force) { Slider(value: $force, in: -1...1) }
4. GameView(force: $force) { Slider(value: $force, in: -1...1) }
5. Button Toggle TapGesture DragGesture ... Slider
6. 1. Device Motion Core Motion Accelerometer Gyroscope WWDC 23: What’s new in Core Motion https://developer.apple.com/videos/play/wwdc2023/10179/
7. https://developer.apple.com/documentation/coremotion/getting-raw-accelerometer-events GameView(force: Binding(get: { cmMotionManager.accelerometerData?.acceleration.x ?? 0 }, set: { _ in })) .onAppear { cmMotionManager.startAccelerometerUpdates() }
8. 2. External Keyboard
9. https://developer.apple.com/documentation/swiftui/view /accessibilityadjustableaction(_:) GameView(force: $force) .accessibilityAdjustableAction { direction in switch direction { case .increment: force += 0.1 case .decrement: force -= 0.1 @unknown default: break } }
10. 3. Game Controller
11. https://developer.apple.com/documentation/gamecontroller/handling-input-events GameView( force: Binding(get: { GCController.current?.input.dpads[.leftThumbstick]?.xAxis.value ?? 0 }, set: { _ in }) )
12. 4. Eye Tracking (iOS 18) 👀
13. https://developer.apple.com/documentation/swiftui/view/ onhover(perform:) GameView(force: $force) { HStack(spacing: 0) { Color.clear.onHover { hover in if hover { force = -0.1 } } Color.clear.onHover { hover in if hover { force = 0.1 } } } }
14. References • Core Motion / Getting raw accelerometer events https://developer.apple.com/documentation/coremotion/getting-raw-accelerometer-events • SwiftUI / View / accessibilityAdjustableAction(_:) https://developer.apple.com/documentation/swiftui/view/accessibilityadjustableaction(_:) • Game Controller / Handling input events https://developer.apple.com/documentation/gamecontroller/handling-input-events • SwiftUI / View / onHover(perform:) https://developer.apple.com/documentation/swiftui/view/onhover(perform:) Follow 「iamhands0me」on