truesheet-usage（真实表用法）

TrueSheet Consumer Guide

Use this skill to produce correct, idiomatic code for apps that consume @lodev09/react-native-true-sheet. It covers choosing the right integration pattern, applying the public API correctly, and avoiding platform-specific pitfalls.

Quick Start

The simplest sheet: a ref, a button, and some content.

import { useRef } from 'react'
import { Button, Text, View } from 'react-native'
import { TrueSheet } from '@lodev09/react-native-true-sheet'

export function App() {
  const sheet = useRef<TrueSheet>(null)

  return (
    <View>
      <Button title="Open" onPress={() => sheet.current?.present()} />
      <TrueSheet ref={sheet} detents={['auto']} cornerRadius={24} grabber>
        <View style={{ padding: 16 }}>
          <Text>Hello from the sheet</Text>
          <Button title="Close" onPress={() => sheet.current?.dismiss()} />
        </View>
      </TrueSheet>
    </View>
  )
}

Choose the Right Control Pattern

Pick one based on where the trigger lives relative to the sheet and which platforms you target.

Ref-based

Already shown in Quick Start. Use present(), dismiss(), resize(index) on the ref.

Named sheet with global methods (native only)

When the trigger is far from where the sheet renders:

// Somewhere in the tree
<TrueSheet name="profile" detents={['auto', 1]}>
  <ProfileContent />
</TrueSheet>

// Anywhere else (native only)
await TrueSheet.present('profile')
await TrueSheet.dismiss('profile')
await TrueSheet.resize('profile', 1)
await TrueSheet.dismissAll()

Every name must be unique. Static methods don't exist on web — use the provider pattern instead.

Web control with provider

Wrap your app with TrueSheetProvider (on native this is a pass-through with zero overhead):

import { TrueSheet, TrueSheetProvider, useTrueSheet } from '@lodev09/react-native-true-sheet'

function Toolbar() {
  const { present, dismiss } = useTrueSheet()
  return <Button title="Open" onPress={() => present('settings')} />
}

export function App() {
  return (
    <TrueSheetProvider>
      <Toolbar />
      <TrueSheet name="settings" detents={[0.5, 1]}>
        <SettingsContent />
      </TrueSheet>
    </TrueSheetProvider>
  )
}

Navigation (React Navigation / Expo Router)

See advanced patterns reference for full setup with createTrueSheetNavigator, Expo Router layouts, screen options, and useTrueSheetNavigation.

Reanimated

See advanced patterns reference for ReanimatedTrueSheet, ReanimatedTrueSheetProvider, and animated values (animatedPosition, animatedIndex, animatedDetent).

Detents

Detents define the heights the sheet can snap to. You get up to 3 detents, sorted smallest to largest.

// Content-sized sheet
<TrueSheet detents={['auto']} />

// Half and full screen
<TrueSheet detents={[0.5, 1]} />

// Three stops: peek, half, full
<TrueSheet detents={[0.25, 0.5, 1]} />

The one rule you can't break: never combine 'auto' with scrollable. Auto-sizing needs to measure the full content, but a scrollable sheet clips it — they're fundamentally incompatible. Use fractional detents for scrollable sheets.

Common Recipes

Scrollable content

<TrueSheet detents={[0.5, 1]} scrollable cornerRadius={24} grabber>
  <ScrollView>
    {items.map(item => <ItemRow key={item.id} item={item} />)}
  </ScrollView>
</TrueSheet>

• The scrollable prop auto-detects ScrollView/FlatList up to 2 levels deep
• On iOS, scrolling to top expands to next detent — disable with scrollableOptions={{scrollingExpandsSheet: false}}
• On Android, nested scrolling is handled automatically

Fixed header and footer

<TrueSheet
  detents={[0.5, 1]}
  scrollable
  header={
    <View style={{ padding: 16 }}>
      <Text style={{ fontSize: 18, fontWeight: 'bold' }}>Title</Text>
    </View>
  }
  footer={<BottomActions />}
>
  <ScrollView>{/* ... */}</ScrollView>
</TrueSheet>

Use the header and footer props — they render in native container views, so the layout math is handled for you. Don't fake it with absolute positioning.

Non-dismissible confirmation

<TrueSheet
  ref={sheet}
  detents={['auto']}
  dismissible={false}
  draggable={false}
  dimmed
  grabber={false}
>
  <View style={{ padding: 24 }}>
    <Text>Are you sure?</Text>
    <Button title="Confirm" onPress={handleConfirm} />
    <Button title="Cancel" onPress={() => sheet.current?.dismiss()} />
  </View>
</TrueSheet>

iOS blur background

<TrueSheet detents={['auto']} backgroundBlur="system-material">
  <View style={{ padding: 16 }}>
    <Text>Blurred sheet</Text>
  </View>
</TrueSheet>

Fine-tune with blurOptions={{intensity: 80, interaction: true}}. Blur is iOS-only.

Present on mount

<TrueSheet detents={['auto', 1]} initialDetentIndex={0} initialDetentAnimated>
  <WelcomeContent />
</TrueSheet>

Dimming control

// No dimming (allows background interaction)
<TrueSheet dimmed={false} detents={['auto']} />

// Dim only above a certain detent
<TrueSheet detents={['auto', 0.7, 1]} dimmedDetentIndex={1} />

Resize programmatically

resize() takes a detent index, not a value:

const sheet = useRef<TrueSheet>(null)

// detents={[0.3, 0.6, 1]}
await sheet.current?.resize(2) // expands to full (index 2)

Rules That Save Debugging Time

1. Max 3 detents, sorted smallest → largest.
2. Never 'auto' + scrollable — they're incompatible.
3. resize() takes an index, not a fraction. resize(1) means "go to the second detent."
4. Sheet names must be unique across your entire app.
5. Static methods are native-only — use useTrueSheet() on web.
6. Don't use autoFocus on TextInputs inside sheets. Focus in onDidPresent instead: <TrueSheet onDidPresent={() => inputRef.current?.focus()}>
7. Use flexGrow: 1 (not flex: 1) inside GestureHandlerRootView on Android.
8. Dismiss sheets before closing Modals on iOS — React Native has a bug where dismissing a Modal while a sheet is visible causes a blank screen.
9. Use header/footer props for fixed chrome — don't reach for absolute positioning.
10. Liquid Glass is automatic on iOS 26+. Set backgroundColor to disable it per-sheet, or add UIDesignRequiresCompatibility to Info.plist to disable app-wide.

Platform Differences at a Glance

Events

The most commonly used events:

For the full event list (drag events, focus/blur events, will/did lifecycle pairs, onBackPress), see the API reference.

Methods

On a ref:

• present(index?, animated?) — show the sheet
• dismiss(animated?) — hide the sheet and all its children
• dismissStack(animated?) — hide only sheets stacked on top
• resize(index) — snap to a detent by index

Global (native only):

• TrueSheet.present(name, index?, animated?)
• TrueSheet.dismiss(name, animated?)
• TrueSheet.dismissStack(name, animated?)
• TrueSheet.resize(name, index)
• TrueSheet.dismissAll(animated?)

Web hook:

const { present, dismiss, dismissStack, resize, dismissAll } = useTrueSheet()

Stacking Sheets

Present a new sheet while another is visible and the first one hides automatically. Dismiss the top sheet and the previous one comes back. This is built-in — no extra config needed.

• dismiss() cascades: it dismisses the current sheet plus everything stacked on top
• dismissStack() dismisses only the sheets on top, keeping the current one visible
• Use onDidFocus / onDidBlur to react to a sheet gaining or losing the top position

Deep-Dive References

When you need the full picture, load these reference files: