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Complete guide for building beautiful apps with Expo Router. Covers fundamentals, styling, components, navigation, animations, patterns, and native tabs.
デフォルトでは、最初にソースを確認する Prompt が選択されています。直接コマンドに切り替えるか、ローカルコピーをダウンロードすることもできます。
インストールを決める前に、SKILL.md と SkillsMP に表示されている付属ファイルをお読みください。
Codex または Claude でインストール この Prompt をコピーして Codex、Claude、または他のアシスタントに貼り付けると、Skill ページを確認してインストールできます。
直接コマンドでは確認用 Prompt が省略されます。実行前にソースを確認してください。
npx skills add https://github.com/BEKO2210/Firstbrain --skill building-native-uiコマンドは1行のまま表示されます。コピー前に横へスクロールして全体を確認してください。
ローカルで確認しますか？SkillsMP が現在取得できるファイルをダウンロードできます。
SOC 職業分類に基づく
SKILL.md を表示中
| name | building-native-ui |
| description | Complete guide for building beautiful apps with Expo Router. Covers fundamentals, styling, components, navigation, animations, patterns, and native tabs. |
| type | skill |
| created | 2026-02-27T00:00:00.000Z |
| domain | design-creative |
| category | ui-ux |
| risk | unknown |
| source | community |
| tags | ["skill","design-creative","ui-ux","building","native"] |
Consult these resources as needed:
references/
animations.md Reanimated: entering, exiting, layout, scroll-driven, gestures
controls.md Native iOS: Switch, Slider, SegmentedControl, DateTimePicker, Picker
form-sheet.md Form sheets in expo-router: configuration, footers and background interaction.
gradients.md CSS gradients via experimental_backgroundImage (New Arch only)
icons.md SF Symbols via expo-image (sf: source), names, animations, weights
media.md Camera, audio, video, and file saving
route-structure.md Route conventions, dynamic routes, groups, folder organization
search.md Search bar with headers, useSearch hook, filtering patterns
storage.md SQLite, AsyncStorage, SecureStore
tabs.md NativeTabs, migration from JS tabs, iOS 26 features
toolbar-and-headers.md Stack headers and toolbar buttons, menus, search (iOS only)
visual-effects.md Blur (expo-blur) and liquid glass (expo-glass-effect)
webgpu-three.md 3D graphics, games, GPU visualizations with WebGPU and Three.js
zoom-transitions.md Apple Zoom: fluid zoom transitions with Link.AppleZoom (iOS 18+)
CRITICAL: Always try Expo Go first before creating custom builds.
Most Expo apps work in Expo Go without any custom native code. Before running npx expo run:ios or npx expo run:android:
npx expo start and scan the QR code with Expo GoYou need npx expo run:ios/android or eas build ONLY when using:
modules/)@bacons/apple-targets)app.jsonExpo Go supports a huge range of features out of the box:
expo-* packages (camera, location, notifications, etc.)If you're unsure, try Expo Go first. Creating custom builds adds complexity, slower iteration, and requires Xcode/Android Studio setup.
comment-card.tsxSee ./references/route-structure.md for detailed route conventions.
app directory.expo-audio not expo-avexpo-video not expo-avexpo-image with source="sf:name" for SF Symbols, not expo-symbols or @expo/vector-iconsreact-native-safe-area-context not react-native SafeAreaViewprocess.env.EXPO_OS not Platform.OSReact.use not React.useContextexpo-image Image component instead of intrinsic element imgexpo-glass-effect for liquid glass backdrops<ScrollView contentInsetAdjustmentBehavior="automatic" /> instead of <SafeAreaView> for smarter safe area insetscontentInsetAdjustmentBehavior="automatic" should be applied to FlatList and SectionList as welluseWindowDimensions over Dimensions.get() to measure screen size<Switch /> from React Native and @react-native-community/datetimepickercontentInsetAdjustmentBehavior="automatic" setScrollView to the page it should almost always be the first component inside the route componentheaderSearchBarOptions in Stack.Screen options to add a search bar<Text selectable /> prop on text containing data that could be copiedFollow Apple Human Interface Guidelines.
contentInsetAdjustmentBehavior="automatic"{ borderCurve: 'continuous' } for rounded corners unless creating a capsule shapecontentContainerStyle padding and gap instead of padding on the ScrollView itself (reduces clipping)selectable prop to every <Text/> element displaying important data or error messages{ fontVariant: 'tabular-nums' } for alignmentUse CSS boxShadow style prop. NEVER use legacy React Native shadow or elevation styles.
<View style={{ boxShadow: "0 1px 2px rgba(0, 0, 0, 0.05)" }} />
'inset' shadows are supported.
Use <Link href="/path" /> from 'expo-router' for navigation between routes.
import { Link } from 'expo-router';
// Basic link
<Link href="/path" />
// Wrapping custom components
<Link href="/path" asChild>
<Pressable>...</Pressable>
</Link>
Whenever possible, include a <Link.Preview> to follow iOS conventions. Add context menus and previews frequently to enhance navigation.
_layout.tsx files to define stacksSet the page title in Stack.Screen options:
<Stack.Screen options={{ title: "Home" }} />
Add long press context menus to Link components:
import { Link } from "expo-router";
<Link href="/settings" asChild>
<Link.Trigger>
<Pressable>
<Card />
</Pressable>
</Link.Trigger>
<Link.Menu>
<Link.MenuAction
title="Share"
icon="square.and.arrow.up"
onPress={handleSharePress}
/>
<Link.MenuAction
title="Block"
icon="nosign"
destructive
onPress={handleBlockPress}
/>
<Link.Menu title="More" icon="ellipsis">
<Link.MenuAction title="Copy" icon="doc.on.doc" onPress={() => {}} />
<Link.MenuAction
title="Delete"
icon="trash"
destructive
onPress={() => {}}
/>
</Link.Menu>
</Link.Menu>
</Link>;
Use link previews frequently to enhance navigation:
<Link href="/settings">
<Link.Trigger>
<Pressable>
<Card />
</Pressable>
</Link.Trigger>
<Link.Preview />
</Link>
Link preview can be used with context menus.
Present a screen as a modal:
<Stack.Screen name="modal" options={{ presentation: "modal" }} />
Prefer this to building a custom modal component.
Present a screen as a dynamic form sheet:
<Stack.Screen
name="sheet"
options={{
presentation: "formSheet",
sheetGrabberVisible: true,
sheetAllowedDetents: [0.5, 1.0],
contentStyle: { backgroundColor: "transparent" },
}}
/>
contentStyle: { backgroundColor: "transparent" } makes the background liquid glass on iOS 26+.A standard app layout with tabs and stacks inside each tab:
app/
_layout.tsx — <NativeTabs />
(index,search)/
_layout.tsx — <Stack />
index.tsx — Main list
search.tsx — Search view
// app/_layout.tsx
import { NativeTabs, Icon, Label } from "expo-router/unstable-native-tabs";
import { Theme } from "../components/theme";
export default function Layout() {
return (
<Theme>
<NativeTabs>
<NativeTabs.Trigger name="(index)">
<Icon sf="list.dash" />
<Label>Items</Label>
</NativeTabs.Trigger>
<NativeTabs.Trigger name="(search)" role="search" />
</NativeTabs>
</Theme>
);
}
Create a shared group route so both tabs can push common screens:
// app/(index,search)/_layout.tsx
import { Stack } from "expo-router/stack";
import { PlatformColor } from "react-native";
export default function Layout({ segment }) {
const screen = segment.match(/\((.*)\)/)?.[1]!;
const titles: Record<string, string> = { index: "Items", search: "Search" };
return (
<Stack
screenOptions={{
headerTransparent: true,
headerShadowVisible: false,
headerLargeTitleShadowVisible: false,
headerLargeStyle: { backgroundColor: "transparent" },
headerTitleStyle: { color: PlatformColor("label") },
headerLargeTitle: true,
headerBlurEffect: "none",
headerBackButtonDisplayMode: "minimal",
}}
>
<Stack.Screen name={screen} options={{ title: titles[screen] }} />
<Stack.Screen name="i/[id]" options={{ headerLargeTitle: false }} />
</Stack>
);
}