This is documentation for the next SDK version. For up-to-date documentation, see the latest version (SDK 57).

确认对话框

一个用于显示确认提示的 SwiftUI ConfirmationDialog 组件。

iOS

tvOS

Included in Expo Go

GitHub

npm

更新日志

Expo UI 的 ConfirmationDialog 与官方 SwiftUI confirmationDialog API 一致，并提供一个带有标题、操作和可选消息的操作表样式对话框。

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

基础确认对话框

使用 ConfirmationDialog.Trigger 来定义可见元素，并使用 ConfirmationDialog.Actions 来提供对话框按钮。

BasicConfirmationDialogExample.tsx

import { useState } from 'react';
import { Host, ConfirmationDialog, Button, Text } from '@expo/ui/swift-ui';

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

  return (
    <Host matchContents>
      <ConfirmationDialog
        title="你确定吗？"
        isPresented={isPresented}
        onIsPresentedChange={setIsPresented}
        titleVisibility="visible">
        <ConfirmationDialog.Trigger>
          <Button label="显示对话框" onPress={() => setIsPresented(true)} />
        </ConfirmationDialog.Trigger>
        <ConfirmationDialog.Actions>
          <Button label="确认" onPress={() => setIsPresented(false)} />
          <Button label="取消" role="cancel" />
        </ConfirmationDialog.Actions>
      </ConfirmationDialog>
    </Host>
  );
}

危险操作确认

在 ConfirmationDialog.Actions 内的 Button 上使用 role="destructive"，将其样式设置为危险操作。

DestructiveConfirmationDialogExample.tsx

import { useState } from 'react';
import { Host, ConfirmationDialog, Button, Text } from '@expo/ui/swift-ui';

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

  return (
    <Host matchContents>
      <ConfirmationDialog
        title="删除项目？"
        isPresented={isPresented}
        onIsPresentedChange={setIsPresented}
        titleVisibility="visible">
        <ConfirmationDialog.Trigger>
          <Button label="删除" role="destructive" onPress={() => setIsPresented(true)} />
        </ConfirmationDialog.Trigger>
        <ConfirmationDialog.Actions>
          <Button
            label="删除"
            role="destructive"
            onPress={() => {
              console.log('Deleted');
              setIsPresented(false);
            }}
          />
          <Button label="取消" role="cancel" />
        </ConfirmationDialog.Actions>
        <ConfirmationDialog.Message>
          <Text>此操作无法撤销。</Text>
        </ConfirmationDialog.Message>
      </ConfirmationDialog>
    </Host>
  );
}

带消息和多个操作

使用 ConfirmationDialog.Message 在标题下方显示描述性消息，并包含多个操作按钮以提供不同选择。

MultiActionConfirmationDialogExample.tsx

import { useState } from 'react';
import { Host, ConfirmationDialog, Button, Text } from '@expo/ui/swift-ui';

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

  return (
    <Host matchContents>
      <ConfirmationDialog
        title="保存更改？"
        isPresented={isPresented}
        onIsPresentedChange={setIsPresented}
        titleVisibility="visible">
        <ConfirmationDialog.Trigger>
          <Button label="关闭文档" onPress={() => setIsPresented(true)} />
        </ConfirmationDialog.Trigger>
        <ConfirmationDialog.Actions>
          <Button label="保存" onPress={() => console.log('Saved')} />
          <Button label="放弃" role="destructive" onPress={() => console.log('Discarded')} />
          <Button label="取消" role="cancel" />
        </ConfirmationDialog.Actions>
        <ConfirmationDialog.Message>
          <Text>你有未保存的更改。你想怎么做？</Text>
        </ConfirmationDialog.Message>
      </ConfirmationDialog>
    </Host>
  );
}

隐藏标题

设置 titleVisibility="hidden" 可在隐藏对话框标题的同时仍显示操作和消息。为了可访问性，你仍应提供一个 title。

HiddenTitleConfirmationDialogExample.tsx

import { useState } from 'react';
import { Host, ConfirmationDialog, Button, Text } from '@expo/ui/swift-ui';

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

  return (
    <Host matchContents>
      <ConfirmationDialog
        title="隐藏标题"
        isPresented={isPresented}
        onIsPresentedChange={setIsPresented}
        titleVisibility="hidden">
        <ConfirmationDialog.Trigger>
          <Button label="显示对话框" onPress={() => setIsPresented(true)} />
        </ConfirmationDialog.Trigger>
        <ConfirmationDialog.Actions>
          <Button label="确定" onPress={() => setIsPresented(false)} />
          <Button label="取消" role="cancel" />
        </ConfirmationDialog.Actions>
        <ConfirmationDialog.Message>
          <Text>只有消息和操作可见。</Text>
        </ConfirmationDialog.Message>
      </ConfirmationDialog>
    </Host>
  );
}

API

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

Component

`ConfirmationDialog`

iOS

tvOS

Type: React.Element<ConfirmationDialogProps>

ConfirmationDialog presents a confirmation dialog with a title, optional message, and action buttons.

See: https://developer.apple.com/documentation/swiftui/view/confirmationdialog(_:ispresented:titlevisibility:actions:message:)

Props of the ConfirmationDialog component.

ConfirmationDialogProps

`children`

iOS

tvOS

Type: ReactNode

The contents of the confirmation dialog. Should include ConfirmationDialog.Trigger, ConfirmationDialog.Actions, and optionally ConfirmationDialog.Message.

`isPresented`

iOS

tvOS

Optional • Type: boolean

Whether the confirmation dialog is presented.

`onIsPresentedChange`

iOS

tvOS

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

A callback that is called when the isPresented state changes.

`title`

iOS

tvOS

Type: string

The title of the confirmation dialog.

`titleVisibility`

iOS

tvOS

Optional • Literal type: string • Default: 'automatic'

The visibility of the dialog title.

Acceptable values are: 'automatic' | 'visible' | 'hidden'

Inherited props

CommonViewModifierProps