如何在反应中将功能传输到功能组件

Question

我在反应和打字稿方面有点新，并且在将函数从文件App.tsx到名为WordAddingForm.tsx功能组件时遇到了一些问题， WordAddingForm.tsx ！

所以这是我的App.tsx文件：

import React, {FC, useState} from 'react';
import WordAddingForm from './components/WordAddingForm';
import {observer} from "mobx-react-lite";
import WordService from "./services/WordService"

const App: FC = () => {

  const {store} = useContext(Context)
  const [words, setWords] = useState<IWord[]>([])
  
  async function getWords() {
    try {
      const response = await WordService.fetchWords()
      setWords(response.data)
    } catch (e) {
      console.log(e)
    }
  }

  return (
    <div>
      <div><WordAddingForm/></div>
    </div>
  )
}

export default observer(App);

我需要将函数getWords传输到组件 这是我的WordAddingForm.tsx文件：

import React, {FC, useContext, useState} from 'react';
import {Context} from "../index";
import {observer} from "mobx-react-lite";
import WordService from '../services/WordService';

const WordAddingForm: FC = () => {

    const [word, setWord] = useState<string>('')
    const [wordT, setWordT] = useState<string>('')
    const [instance, setInstance] = useState<string>('')
    const [instanceT, setInstanceT] = useState<string>('')
    const {store} = useContext(Context)

    function clear():void {
        setWord('')
        setWordT('')
        setInstance('')
        setInstanceT('')
    }

    async function createWord(word:string, wordT:string, instance:string, instanceT:string) {
        try {
          const response = await store.createWord(word, wordT, instance, instanceT)
          console.log(response)
          clear()
        } catch (e) {
          console.log(e)
        }
      }

    return (
        <div>
            <input
            onChange={e => setWord(e.target.value)}
            value={word}
            type="text"
            placeholder="word"
            />
            <input
            onChange={e => setWordT(e.target.value)}
            value={wordT}
            type="text"
            placeholder="word translation"
            />
            <input
            onChange={e => setInstance(e.target.value)}
            value={instance}
            type="text"
            placeholder="instance of using this word"
            />
            <input
            onChange={e => setInstanceT(e.target.value)}
            value={instanceT}
            type="text"
            placeholder="instance translation"
            />
            <button
            onClick={() => {
                createWord(word, wordT, instance, instanceT)
                clear()
                }}>
                add word +
            </button>
        </div>
    )
}

export default observer(WordAddingForm)

我需要将函数getWords传输到<WordAddingForm/>以在此组件中使用它并在将新单词添加到数据库后再次更新单词列表 像<WordAddingForm props={getWords}/>或<WordAddingForm {getWords}/>一样没有帮助

Answer 1

<WordAddingForm getWords={getWords} />

这就是您将其传递给组件的方式。 在WordAddingForm内部WordAddingForm ，您必须通过参数接收 props 对象：

interface Props {
  getWords: () => Promise<any>
}
const WordAddingForm: FC<Props> = (props) => {
// use your function as props.getWords()
}