我有这段代码,应该绘制复选框。
这是我的 Hashtags.js 文件:
import React, { useState } from 'react';
import {StyleSheet, View, Image} from 'react-native';
import { CheckBox } from 'react-native-elements';
const HashtagsList =[
{checked: false, title: '#tip1'},
{checked: false, title: '#tip2'},
{checked: false, title: '#tip3'},
{checked: false, title: '#tip4'},
{checked: false, title: '#tip5'},
{checked: false, title: '#tip6'},
];
const Hashtags = props => {
const [hashtags, setHastags] = useState([]);
setHastags(HashtagsList);
const toggleCheckbox = (title) =>{
const checkedHashtags = hashtags.find((hashtag) => hashtag.title === title);
checkedHashtags.checked = !checkedHashtags.checked;
const checkboxes = Object.assign({}, hashtags, checkedHashtags);
setHastags({ checkboxes });
};
hashtags.map((hashtag, i) => {
console.log(hashtag);
return (
<CheckBox
key = {i}
title = {hashtag.title}
checkedIcon={<Image style={styles.chekBoxPic} source={require('../assets/svg/checked.svg')} />}
uncheckedIcon={<Image style={styles.chekBoxPic} source={require('../assets/svg/unchecked.svg')} />}
checked={hashtag.checked}
onPress={() => toggleCheckbox(hashtag.title)}
/>
);
})
};
const styles = StyleSheet.create({
chekBoxPic:{
width: 22,
height: 22,
},
});
export default Hashtags;
我的 main.js 页面如下所示:
...
<View type={styles.someStyle}>
<Hashtags />
</View>
...
但我收到错误:“重新渲染次数过多。” React 限制渲染数量以防止无限循环。” 我哪里出错了?
最佳答案
我认为这可能是因为 setHastags(HashtagsList)
导致 Hashtags 组件最终陷入无限循环。
您可以像这样初始化初始 HashtagsList:
const [hashtags, setHastags] = useState(HashtagsList);
关于javascript - CheckBoxes React Native Map函数返回错误: Too many re-renders. React限制渲染数量以防止无限循环,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/59581624/