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September 1, 2023 00:18
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HighlightView
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| // | |
| // HighlightView.swift | |
| // DemoScreen | |
| // | |
| // Created by seoksoon jang on 2023-08-31. | |
| // | |
| import SwiftUI | |
| enum Light: Hashable, CaseIterable { | |
| case red | |
| case yellow | |
| case green | |
| var color: Color { | |
| switch self { | |
| case .red: return .red | |
| case .yellow: return .yellow | |
| case .green: return .green | |
| } | |
| } | |
| } | |
| struct LightsView: View { | |
| let namespace: Namespace.ID | |
| var body: some View { | |
| VStack(spacing: 20) { | |
| ForEach(Light.allCases, id: \.self) { light in | |
| Circle() | |
| .foregroundColor(light.color) | |
| .matchedGeometryEffect( | |
| id: light, in: namespace, | |
| properties: .frame, anchor: .center, | |
| isSource: true | |
| ) | |
| } | |
| } | |
| .padding(20) | |
| } | |
| } | |
| struct HighlightingView: View { | |
| var spotlitLight: Light | |
| var isSpotlighting: Bool | |
| @Namespace private var namespace | |
| var body: some View { | |
| ZStack { | |
| LightsView(namespace: namespace) | |
| SpotlightView( | |
| spotlitLight: spotlitLight, | |
| namespace: namespace | |
| ) | |
| .opacity(isSpotlighting ? 0.5 : 0) | |
| .animation( | |
| .easeOut, | |
| value: isSpotlighting ? spotlitLight : nil | |
| ) | |
| } | |
| } | |
| } | |
| struct SpotlightView: View { | |
| var spotlitLight: Light | |
| var namespace: Namespace.ID | |
| var body: some View { | |
| ZStack { | |
| Color.black | |
| Circle() | |
| .foregroundColor(.white) | |
| .blur(radius: 4) | |
| .padding(-10) | |
| .matchedGeometryEffect( | |
| id: spotlitLight, in: namespace, | |
| properties: .frame, anchor: .center, | |
| isSource: false | |
| ) | |
| .blendMode(.destinationOut) | |
| } | |
| .compositingGroup() | |
| } | |
| } | |
| struct HighlightTestView: View { | |
| @State var isSpotlighting = false | |
| @State var spotlitLight: Light = .red | |
| private var selection: Binding<Light?> { | |
| Binding( | |
| get: { isSpotlighting ? spotlitLight : nil }, | |
| set: { | |
| if let light = $0 { | |
| isSpotlighting = true | |
| spotlitLight = light | |
| } else { | |
| isSpotlighting = false | |
| } | |
| } | |
| ) | |
| } | |
| var body: some View { | |
| VStack { | |
| HighlightingView( | |
| spotlitLight: spotlitLight, | |
| isSpotlighting: isSpotlighting | |
| ) | |
| Picker("Light", selection: selection) { | |
| Text("none").tag(Light?.none) | |
| ForEach(Light.allCases, id: \.self) { | |
| Text("\($0)" as String) | |
| .tag(Optional($0)) | |
| } | |
| } | |
| .pickerStyle(.segmented) | |
| } | |
| .padding() | |
| } | |
| } | |
| // https://stackoverflow.com/a/75263911/3426053 |
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