使用带有 props 和 TypeScript 的样式组件

问题描述

我正在尝试将 TypeScript 集成到我们的项目中，到目前为止我偶然发现了一个关于 styled-components 的问题 图书馆.

I'm trying to integrate TypeScript into our project and so far I stumbled upon one issue with styled-components library.

考虑这个组件

import * as React from "react";
import styled from "styled-components/native";
import { TouchableOpacity } from "react-native";

// -- types ----------------------------------------------------------------- //
export interface Props {
  onPress: any;
  src: any;
  width: string;
  height: string;
}

// -- styling --------------------------------------------------------------- //
const Icon = styled.Image`
  width: ${(p: Props) => p.width};
  height: ${(p: Props) => p.height};
`;

class TouchableIcon extends React.Component<Props> {
  // -- default props ------------------------------------------------------- //
  static defaultProps: Partial<Props> = {
    src: null,
    width: "20px",
    height: "20px"
  };

  // -- render -------------------------------------------------------------- //
  render() {
    const { onPress, src, width, height } = this.props;
    return (
      <TouchableOpacity onPress={onPress}>
        <Icon source={src} width={width} height={height} />
      </TouchableOpacity>
    );
  }
}

export default TouchableIcon;

下面一行抛出 3 个错误，本质上是相同的

Following line throws 3 errors, that are same in nature <Icon source={src} width={width} height={height} />

输入 {source: any;宽度:字符串；高度:字符串；} 不可分配键入 IntrinsicAttributes ... 类型中缺少属性onPress"{来源:任何；宽度:字符串；高度:字符串；}

不完全确定这是什么以及如何修复它，我是否需要在 Icon 或类似的东西上声明这些?

Not entirely sure what this is and how to fix it, do I somehow need to declare these on Icon or something of this sort?

typescript v2.6.1, styled-components v2.2.3

typescript v2.6.1, styled-components v2.2.3

推荐答案

这个答案已经过时了，最新的答案在这里:https://stackoverflow.com/a/52045733/1053772

据我所知，目前还没有正式的方法(还没有?)来做到这一点，但你可以通过一些技巧来解决它.首先，创建一个 withProps.ts 文件，内容如下:

As far as I can tell there is no official way (yet?) to do this, but you can solve it with a bit of trickery. First, create a withProps.ts file with the following content:

import * as React from 'react'
import { ThemedStyledFunction } from 'styled-components'

const withProps = <U>() => <P, T, O>(fn: ThemedStyledFunction<P, T, O>) =>
    fn as ThemedStyledFunction<P & U, T, O & U>

export { withProps }

现在，在您的 .tsx 文件中，像这样使用它:

Now, inside your .tsx files, use it like this:

// ... your other imports
import { withProps } from './withProps'

export interface IconProps {
  onPress: any;
  src: any;
  width: string;
  height: string;
}

const Icon = withProps<IconProps>()(styled.Image)`
  width: ${(p: IconProps) => p.width};
  height: ${(p: IconProps) => p.height};
`;

你应该很高兴去.这绝对不理想，希望很快就会有一种方法可以在 TS 中为模板文字提供泛型，但我想现在这是您最好的选择.

And you should be good to go. It's definitely not ideal and hopefully there will be a way to provide generics to template literals soon in TS, but I guess that for now this is your best option.

信用是在信用到期的地方给出的:我从这里复制粘贴了这个

Credit is given where credit is due: I copypasted this from here

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