弹出框

一个用于在浮动覆盖层中显示内容的 SwiftUI 弹出组件。

iOS

Included in Expo Go

Recommended version:

~57.0.3

Expo UI 弹出框与官方 SwiftUI Popover API 相匹配，并提供了一种在浮动覆盖层中渲染内容的方法，该覆盖层以触发元素为锚点。

Popover floating above its trigger button

安装

🌐 Installation

Terminal

- npx expo install @expo/ui

If you are installing this in an existing React Native app, make sure to install expo in your project.

用法

🌐 Usage

基本弹出框

🌐 Basic popover

BasicPopoverExample.tsx

import { useState } from 'react';
import { Host, Button, Popover, Text, VStack } from '@expo/ui/swift-ui';
import { padding } from '@expo/ui/swift-ui/modifiers';

export default function BasicPopoverExample() {
  const [isPresented, setIsPresented] = useState(false);

  return (
    <Host matchContents>
      <Popover
        isPresented={isPresented}
        onStateChange={({ isPresented }) => setIsPresented(isPresented)}>
        <Popover.Trigger>
          <Button label="Show Popover" onPress={() => setIsPresented(true)} />
        </Popover.Trigger>
        <Popover.Content>
          <VStack modifiers={[padding({ all: 16 })]}>
            <Text>Hello from Popover!</Text>
          </VStack>
        </Popover.Content>
      </Popover>
    </Host>
  );
}

带有附件锚点

🌐 With attachment anchor

attachmentAnchor 属性控制弹出框附着在触发元素的位置。可用选项有：center、leading、trailing、top 和 bottom。

🌐 The attachmentAnchor prop controls where the popover attaches to the trigger element. Available options are: center, leading, trailing, top, and bottom.

AttachmentAnchorExample.tsx

import { useState } from 'react';
import { Host, Button, Popover, Text, VStack } from '@expo/ui/swift-ui';
import { padding } from '@expo/ui/swift-ui/modifiers';

export default function AttachmentAnchorExample() {
  const [isPresented, setIsPresented] = useState(false);

  return (
    <Host matchContents>
      <Popover
        isPresented={isPresented}
        onStateChange={({ isPresented }) => setIsPresented(isPresented)}
        attachmentAnchor="trailing">
        <Popover.Trigger>
          <Button label="Show Popover" onPress={() => setIsPresented(true)} />
        </Popover.Trigger>
        <Popover.Content>
          <VStack modifiers={[padding({ all: 16 })]}>
            <Text>Attached to trailing edge</Text>
          </VStack>
        </Popover.Content>
      </Popover>
    </Host>
  );
}

带箭头边

🌐 With arrow edge

arrowEdge 属性控制弹出框箭头显示在哪一边。可选的选项有：none、leading、trailing、top 和 bottom。

🌐 The arrowEdge prop controls which edge of the popover displays the arrow. Available options are: none, leading, trailing, top, and bottom.

ArrowEdgeExample.tsx

import { useState } from 'react';
import { Host, Button, Popover, Text, VStack } from '@expo/ui/swift-ui';
import { padding } from '@expo/ui/swift-ui/modifiers';

export default function ArrowEdgeExample() {
  const [isPresented, setIsPresented] = useState(false);

  return (
    <Host matchContents>
      <Popover
        isPresented={isPresented}
        onStateChange={({ isPresented }) => setIsPresented(isPresented)}
        arrowEdge="top">
        <Popover.Trigger>
          <Button label="Show Popover" onPress={() => setIsPresented(true)} />
        </Popover.Trigger>
        <Popover.Content>
          <VStack modifiers={[padding({ all: 16 })]}>
            <Text>Arrow on top edge</Text>
          </VStack>
        </Popover.Content>
      </Popover>
    </Host>
  );
}

使用 React Native 的内容

🌐 With React Native content

你可以使用 RNHostView 将 React Native 组件嵌入到弹出内容中。

🌐 You can use RNHostView to embed React Native components inside the popover content.

RNContentPopoverExample.tsx

import { useState } from 'react';
import { Pressable, Text as RNText, View } from 'react-native';
import { Host, Button, Popover, RNHostView } from '@expo/ui/swift-ui';

export default function RNContentPopoverExample() {
  const [isPresented, setIsPresented] = useState(false);
  const [counter, setCounter] = useState(0);

  return (
    <Host matchContents>
      <Popover
        isPresented={isPresented}
        onStateChange={({ isPresented }) => setIsPresented(isPresented)}>
        <Popover.Trigger>
          <Button label="Show RN Popover" onPress={() => setIsPresented(true)} />
        </Popover.Trigger>
        <Popover.Content>
          <RNHostView matchContents>
            <View style={{ padding: 16 }}>
              <RNText style={{ fontSize: 16, fontWeight: 'bold' }}>React Native Content</RNText>
              <RNText style={{ color: '#666', marginVertical: 8 }}>Counter: {counter}</RNText>
              <Pressable
                style={{
                  backgroundColor: '#007AFF',
                  padding: 12,
                  borderRadius: 8,
                  alignItems: 'center',
                }}
                onPress={() => setCounter(counter + 1)}>
                <RNText style={{ color: 'white' }}>Increment</RNText>
              </Pressable>
            </View>
          </RNHostView>
        </Popover.Content>
      </Popover>
    </Host>
  );
}

应用接口

🌐 API

import { Popover } from '@expo/ui/swift-ui';

Component

`Popover`

Type: React.Element<PopoverViewProps>

Props

`arrowEdge`

Optional • Literal type: string • Default: 'none'

The edge of the attachmentAnchor that defines the location of the popover's arrow. The default is none, which results in the system allowing any arrow edge.

Acceptable values are: 'none' | 'top' | 'bottom' | 'leading' | 'trailing'

`attachmentAnchor`

Optional • Literal type: string

The positioning anchor that defines the attachment point of the popover.

Acceptable values are: 'center' | 'top' | 'bottom' | 'leading' | 'trailing'

`children`

Type: ReactNode

`isPresented`

Optional • Type: boolean

Whether the popover is presented.

`onIsPresentedChange`

Optional • Type: (isPresented: boolean) => void

A callback that is called when the isPresented state changes.

Inherited Props

CommonViewModifierProps