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PagerView
一个与 react-native-pager-view 兼容的横向分页视图。
一个与 react-native-pager-view 兼容的 API 的 PagerView 组件。它封装了平台特定的 @expo/ui 原语:Android 上的 Jetpack Compose HorizontalPager 和 iOS 上的分页 SwiftUI ScrollView。每个子项都会变成独立的页面,并拉伸以填充分页器。
🌐 A PagerView component with an API compatible with react-native-pager-view. It wraps the platform-specific @expo/ui primitives: Jetpack Compose HorizontalPager on Android and a paged SwiftUI ScrollView on iOS. Each child becomes a separate page and stretches to fill the pager.
如果你需要对特定平台的分页行为或修饰符进行更低级别的控制,请直接使用原生原语。在 iOS 上,使用带有 page 样式的 TabView 也可以渲染水平分页器,并且当你想要使用 SwiftUI 内置的分页指示器时可能更合适。
🌐 If you need lower-level control over platform-specific paging behavior or modifiers, use the native primitives directly. On iOS, TabView with the page style also renders a horizontal pager and may fit better when you want SwiftUI's built-in page indicators.
安装
🌐 Installation
- npx expo install @expo/uiIf you are installing this in an existing React Native app, make sure to install expo in your project.
如果你需要以下任意一项,可选择安装 react-native-worklets :
🌐 Optionally, install react-native-worklets if you need either of the following:
- iOS 上的动画
setPage。 如果没有 worklets,iOS 的setPage会退回到非动画跳转。无论如何,Android 都会进行动画。 - 每帧
onPageScroll回调保持在 UI 线程上。 当你的onPageScroll处理程序本身是一个 worklet 时,它会在每一帧上同步运行在 UI 线程上,而不是切换到 JS。没有 worklets 的情况下,回调仍然会触发——只是它在 JS 线程上运行。
从 react-native-pager-view 迁移
🌐 Migrating from react-native-pager-view
通过从 @expo/ui/community/pager-view 导入 PagerView 来更新导入语句:
🌐 Update the import statement by importing PagerView from @expo/ui/community/pager-view:
import PagerView from 'react-native-pager-view'; // becomes: import PagerView from '@expo/ui/community/pager-view';
在你交换之前,你应该了解会发生哪些变化:
🌐 Before you swap, you should know what changes:
orientation="vertical"、keyboardDismissMode、overdrag和overScrollMode不受支持。usePagerView钩子未提供 — 请改用ref。- 在 iOS 上,
onPageScroll和onPageScrollStateChanged仅在 iOS 18 及以上触发。
请参见 平台行为 获取完整列表。
🌐 See Platform behavior for the full list.
基本用法
🌐 Basic usage
import { useRef } from 'react'; import { Button, StyleSheet, Text, View } from 'react-native'; import PagerView, { type PagerViewRef } from '@expo/ui/community/pager-view'; export default function PagerViewExample() { const pagerRef = useRef<PagerViewRef>(null); return ( <View style={{ flex: 1 }}> <PagerView ref={pagerRef} style={{ flex: 1 }} initialPage={0} onPageSelected={event => { console.log('selected page', event.nativeEvent.position); }}> <View key="one" style={[styles.page, { backgroundColor: '#fde68a' }]}> <Text>Page one</Text> </View> <View key="two" style={[styles.page, { backgroundColor: '#bfdbfe' }]}> <Text>Page two</Text> </View> <View key="three" style={[styles.page, { backgroundColor: '#bbf7d0' }]}> <Text>Page three</Text> </View> </PagerView> <Button title="转到第2页" onPress={() => pagerRef.current?.setPage(1)} /> </View> ); } const styles = StyleSheet.create({ page: { flex: 1, alignItems: 'center', justifyContent: 'center' }, });
平台行为
🌐 Platform behavior
Web 不被支持,在 web 上渲染 PagerView 会在运行时抛出异常。
🌐 Web is not supported and rendering PagerView on web throws at runtime.
| 功能 | Android | iOS |
|---|---|---|
| 最低平台版本 | 任何受支持的版本 | 分页功能需要 iOS 17 以上。在 iOS 16 上,视图可以水平滚动,但分页不会自动对齐 |
onPageScroll / onPageScrollStateChanged | 仅支持 iOS 18 以上。在 iOS 17 上,它们从不触发,并且组件挂载时会记录开发警告 | |
动画 setPage | 原生分页动画 | 通过 react-native-worklets 路由。如果未安装该包,则回退为非动画跳转 |
layoutDirection | ||
offscreenPageLimit | ||
pageMargin |
与上游 react-native-pager-view 的其他差异:
🌐 Additional differences from upstream react-native-pager-view:
orientation="vertical"、keyboardDismissMode、overdrag和overScrollMode不受支持。仅支持水平分页,其他将回退到平台分页器的默认设置。usePagerView钩子未提供。请使用ref到PagerView来访问setPage、setPageWithoutAnimation和setScrollEnabled。setScrollEnabled会触发重新渲染,因此新值会作为属性传递到原生视图。对于从非 React 上下文(例如基于 ref 的手势处理器)进行切换仍然很有用。borderRadius样式在两个平台上都适用。在 Android 上,只有数值会裁剪分页器。底层的 Compose 主机会静默丢弃诸如'50%'这样的字符串值。
应用接口
🌐 API
import PagerView from '@expo/ui/community/pager-view';
Component
Type: React.Element<PagerViewProps>
A drop-in replacement for react-native-pager-view. Renders a horizontally
paged view backed by Jetpack Compose's HorizontalPager on Android and
SwiftUI on iOS. Each child is treated as a separate page.
ReactNodePages of the pager. Each child is treated as a separate page and
stretched to fill the pager. Each child should have a stable key.
number • Default: 0Index of the page that is initially selected. Read once on mount;
later changes are ignored. To navigate after mount, call
ref.setPage() or ref.setPageWithoutAnimation().
string • Default: 'ltr'Layout direction for paging.
Acceptable values are: 'ltr' | 'rtl'
numberNumber of pages kept off-screen on each side of the visible page.
(event: PagerViewOnPageScrollEvent) => voidFires continuously while a swipe is in progress. The event's position
is the index of the leading visible page; offset is the fractional
progress toward the next page in the [0, 1) range.
Mark this handler with 'worklet' (requires react-native-worklets)
to run it synchronously on the UI thread every frame.
(event: PageScrollStateChangedEvent) => voidFires when the scroll state changes between idle, dragging,
and settling.
(event: PagerViewOnPageSelectedEvent) => voidFires when a page is fully selected. The event's position is the
index of the new page.
Ref<PagerViewRef>Ref handle exposing imperative setPage, setPageWithoutAnimation,
and setScrollEnabled methods.
Types
Type: NativeSyntheticEvent<PagerViewOnPageScrollEventData>
Type: Readonly<{
offset: number,
position: number
}>
Type: NativeSyntheticEvent<PagerViewOnPageSelectedEventData>
Type: Readonly<{
position: number
}>
Ref handle for the PagerView component.
| Property | Type | Description |
|---|---|---|
| setPage | (selectedPage: number) => void | Animate the pager to the given page index. Out-of-range indices are
silently ignored. On iOS the animation requires |
| setPageWithoutAnimation | (selectedPage: number) => void | Jump to the given page index without an animation. |
| setScrollEnabled | (scrollEnabled: boolean) => void | Imperatively enable or disable user scrolling.
|
Type: NativeSyntheticEvent<PageScrollStateChangedEventData>
Type: Readonly<{
pageScrollState: 'idle' | 'dragging' | 'settling'
}>