如何在 React Native 的无状态功能组件中扩展原生组件的 props TypeScript 接口？

Question

为了保持一致的样式，React Native 文档建议编写一个 <CustomText /> 文本组件来包装原生 <Text /> 组件。

虽然这很容易做到，但我无法使用 TypeScript 2 让 <CustomText /> 拥有来自 <Text /> 的所有道具，而无需重新声明它们。

这是我的组件：

import React from 'react';
import { Text } from 'react-native';


interface Props {
    children?: any
}

const CustomText: React.SFC<Props> = (props) => (
    <Text {...props}>
        {props.children}
    </Text>
);

如果我尝试将它与<CustomText numberOfLines={1} /> 一起使用，则会导致错误

TS2339: Property 'numberOfLines' does not exist on type 'IntrinsicAttributes & Props'

在react-native.d.ts，我看到有这个导出：

export interface TextProperties extends React.Props<TextProperties> {

    /**
     * Specifies should fonts scale to respect Text Size accessibility setting on iOS.
     */
    allowFontScaling?: boolean

    /**
     * Line Break mode. Works only with numberOfLines.
     * clip is working only for iOS
     */
    lineBreakMode?: 'head' | 'middle' | 'tail' | 'clip'

    /**
     * Used to truncate the text with an elipsis after computing the text layout, including line wrapping, such that the total number of lines does not exceed this number.
     */
    numberOfLines?: number

    /**
     * Invoked on mount and layout changes with
     *
     * {nativeEvent: { layout: {x, y, width, height}}}.
     */
    onLayout?: ( event: LayoutChangeEvent ) => void

    /**
     * This function is called on press.
     * Text intrinsically supports press handling with a default highlight state (which can be disabled with suppressHighlighting).
     */
    onPress?: () => void

    /**
     * @see https://facebook.github.io/react-native/docs/text.html#style
     */
    style?: TextStyle

    /**
     * Used to locate this view in end-to-end tests.
     */
    testID?: string
}

但我不确定如何扩展它以在我的组件的Props 接口中利用它。

Answer 1

你只需要让你的Props接口扩展TextProperties：

interface Props extends TextProperties {
    children?: any
}

---

编辑

你需要先导入：

import { Text, TextProperties } from 'react-native';