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July 28, 2024 06:04
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| import SwiftUI | |
| struct ContentView: View { | |
| @State private var show = false | |
| @State private var items: [Item] = .samples() | |
| var body: some View { | |
| ScrollView { | |
| LazyVStack { | |
| ForEach(items.indices, id: \.self) { index in | |
| let offset = Double(min(index, 20) + 1) | |
| Button { | |
| action(index: index, item: items[index]) | |
| } label: { | |
| Row(item: items[index], index: index) | |
| } | |
| .buttonStyle(.borderedProminent) | |
| .padding(.horizontal, 20) | |
| .offset(y: show ? 0 : offset * 50) | |
| .opacity(show ? 1 : 0) | |
| .animation(.spring(duration: offset * 0.13), value: show) | |
| } | |
| } | |
| } | |
| .scrollIndicators(.hidden) | |
| .task { | |
| await fetch() | |
| } | |
| .refreshable { | |
| await fetch() | |
| } | |
| } | |
| func fetch() async { | |
| withAnimation { show = false } | |
| await Task { try? await Task.sleep(nanoseconds: 1_000_000_000) }.value | |
| items = .samples() | |
| withAnimation { show = true } | |
| } | |
| func action(index: Int, item: Item) { | |
| print(index, item.code) | |
| } | |
| } | |
| struct Row: View { | |
| let item: Item | |
| let index: Int | |
| var body: some View { | |
| VStack { | |
| HStack(spacing: 16) { | |
| Circle() | |
| .foregroundStyle(icon) | |
| .frame(width: 40) | |
| VStack(alignment: .leading) { | |
| Text(item.code) | |
| .font(.headline) | |
| Text(item.name) | |
| .foregroundStyle(.secondary) | |
| } | |
| Spacer() | |
| Text(item.price) | |
| .font(.headline.monospacedDigit()) | |
| } | |
| .foregroundStyle(.background) | |
| .multilineTextAlignment(.leading) | |
| .padding() | |
| } | |
| } | |
| var icon: some ShapeStyle { | |
| let colorss = [[Color]].colors | |
| let colors = colorss[index % colorss.count] | |
| return LinearGradient(colors: colors, startPoint: .top, endPoint: .bottom) | |
| } | |
| } | |
| struct Item: Identifiable, Hashable { | |
| var id: String { code } | |
| let code: String | |
| let name: String | |
| let price: String | |
| init(code: String, name: String) { | |
| self.code = code | |
| self.name = name | |
| self.price = "$\(Int.random(in: 30..<999))" | |
| } | |
| } | |
| extension [Item] { | |
| static func samples() -> Self { | |
| return [ | |
| Item(code: "MFST", name: "マイクロソフト"), | |
| Item(code: "AAPL", name: "アップル"), | |
| Item(code: "NVDA", name: "エヌビディア"), | |
| Item(code: "AMZN", name: "アマゾン・ドット・コム"), | |
| Item(code: "META", name: "メタ・プラットフォームズ"), | |
| Item(code: "GOOG", name: "アルファベット"), | |
| Item(code: "BRK", name: "バークシャー・ハサウェイ"), | |
| Item(code: "LLY", name: "イーライリリー"), | |
| Item(code: "AVGO", name: "ブロードコム"), | |
| Item(code: "JPM", name: "JPモルガン・チェース・アンド・カンパニー"), | |
| ] | |
| } | |
| } | |
| extension [[Color]] { | |
| static let colors: [[Color]] = [ | |
| [.orange, .pink], | |
| [.mint, .green], | |
| [.cyan, .blue], | |
| [.purple, .pink], | |
| [.purple, .orange], | |
| [.cyan, .mint], | |
| [.yellow, .orange], | |
| [.red, .blue], | |
| ] | |
| } | |
| #Preview { | |
| ContentView() | |
| } |
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