This is documentation for the next SDK version. For up-to-date documentation, see the latest version (SDK 55).

ZStack

一个用于重叠布局的 SwiftUI ZStack 组件。

iOS

tvOS

GitHub

npm

更新日志

Expo UI ZStack 与官方 SwiftUI ZStack API 保持一致，并将其子元素相互叠加显示。

安装

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

基本重叠栈

BasicZStackExample.tsx

import { Host, ZStack, Rectangle, Text } from '@expo/ui/swift-ui';
import { frame, foregroundStyle } from '@expo/ui/swift-ui/modifiers';

export default function BasicZStackExample() {
  return (
    <Host matchContents>
      <ZStack>
        <Rectangle modifiers={[frame({ width: 100, height: 100 })]} />
        <Text modifiers={[foregroundStyle({ color: 'white' })]}>覆盖层</Text>
      </ZStack>
    </Host>
  );
}

使用对齐

alignment 属性控制子元素在栈内的定位方式。可用选项包括：center、leading、trailing、top、bottom、topLeading、topTrailing、bottomLeading 和 bottomTrailing。

ZStackAlignmentExample.tsx

import { Host, ZStack, Rectangle, Circle } from '@expo/ui/swift-ui';
import { frame, foregroundStyle } from '@expo/ui/swift-ui/modifiers';

export default function ZStackAlignmentExample() {
  return (
    <Host matchContents>
      <ZStack alignment="bottomTrailing">
        <Rectangle
          modifiers={[frame({ width: 100, height: 100 }), foregroundStyle({ color: 'blue' })]}
        />
        <Circle modifiers={[frame({ width: 30, height: 30 }), foregroundStyle({ color: 'red' })]} />
      </ZStack>
    </Host>
  );
}

创建徽标覆盖层

ZStackBadgeExample.tsx

import { Host, ZStack, Circle, Text, Image } from '@expo/ui/swift-ui';
import { frame, foregroundStyle } from '@expo/ui/swift-ui/modifiers';

export default function ZStackBadgeExample() {
  return (
    <Host matchContents>
      <ZStack alignment="topTrailing">
        <Image systemName="bell.fill" size={32} color="blue" />
        <Circle modifiers={[frame({ width: 16, height: 16 }), foregroundStyle({ color: 'red' })]} />
      </ZStack>
    </Host>
  );
}

API

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

Component

`ZStack`

iOS

tvOS

Type: React.Element<ZStackProps>

ZStackProps

`alignment`

iOS

tvOS

Optional • Literal type: string

The alignment of children within the stack.

`children`

iOS

tvOS

Type: React.ReactNode

Inherited Props

CommonViewModifierProps