这可能是一个快速解决方案,但是过去一段时间我一直在绞尽脑汁,并且真的可以用另一双眼睛看一下。
基本上,我试图渲染一个充满生成的JSX元素的数组。我跌倒了,就像我做了一百万次一样,但是在这里似乎不起作用。
此处提供代码:
import React, { Fragment } from 'react'
import css from './Search.scss';
import Header from '../SectionHeader/Header';
import SearchItem from '../SearchItem/SearchItem';
const Search = (props) => {
const { coinObject, coinKeys } = props;
let searchResults = []; // Array in question
const findResults = (searchText) => {
searchResults = []; // Reset the array to blank for each new character typed in input
for(let i = 0; i < coinKeys.length; i++) {
const { FullName } = coinObject[coinKeys[i]]; // App specific logic, not important, or the problem here
if(FullName.toLowerCase().includes(searchText) && (searchResults.length < 5)) {
console.log(FullName, searchText); // Prints the correct Full name based off of the searched text
searchResults.push(<SearchItem key={i} searchText={FullName} />);
}
}
console.log(searchResults); // Prints the updated array with all react elements
}
return (
<Fragment>
<Header title='Find Coins!' />
<div className={css.searchContainer}>
<div className={css.inputContainer}>
<input onChange={input => findResults(input.target.value)} className={css.searchInput} type='text' placeholder='Start Typing a Coin'/>
</div>
{ searchResults }
</div>
</Fragment>
);
}
export default Search;
还有SearchItem组件,它非常简单:
import React from 'react'
import css from './SearchItem.scss';
const SearchItem = (props) => {
return (
<div className={css.searchItem}>
{props.searchText}
</div>
)
}
export default SearchItem;
对于上下文,此组件仅获取一个巨大的数据对象,并将显示与输入文本匹配的前5个实例。我正在尝试使这些搜索过滤器成为其中之一,在您键入内容时,它会建议与数据匹配的事物。
数组被更新,我可以看到数组中的JSX对象,它们只是不呈现。我感觉是由于数组未重新渲染?
非常感谢您的帮助。谢谢!
答案 0 :(得分:1)
您可以将Search
组件变成有状态组件,并以您的状态存储searchResults
,以便在更新组件时将其重新呈现。
示例
class Search extends React.Component {
state = { searchResults: [] };
findResults = searchText => {
const { coinObject, coinKeys } = this.props;
const searchResults = [];
for (let i = 0; i < coinKeys.length; i++) {
const { FullName } = coinObject[coinKeys[i]];
if (
FullName.toLowerCase().includes(searchText) &&
searchResults.length < 5
) {
searchResults.push(FullName);
}
}
this.setState({ searchResults });
};
render() {
return (
<Fragment>
<Header title="Find Coins!" />
<div className={css.searchContainer}>
<div className={css.inputContainer}>
<input
onChange={event => findResults(event.target.value)}
className={css.searchInput}
type="text"
placeholder="Start Typing a Coin"
/>
</div>
{this.state.searchResults.map((fullName, i) => (
<SearchItem key={i} searchText={fullName} />
))}
</div>
</Fragment>
);
}
}