在这个屏幕上,我在我的react本机应用程序中获得了Rendered more hooks than during the previous render错误:
const HomeScreen = props => {
const [refreshing, setRefreshing] = useState(false);
if (props.data.loading) { // error shows its located here
return <Text>Loading...</Text>;
}
const onRefres
我正在编写一个自定义钩子,以便在realm-js中使用它。 export default function useRealmResultsHook<T>(query, args): Array<T> {
const [data, setData] = useState([]);
useEffect(
() => {
function handleChange(newData: Array<T>) {
// This does not update FlatList, but setData([...new
import React,{Component} from 'react';
import { Flatlist, Text, View} from 'react-native';
export default class List extends Component {
state={
person:[{name:'abhjeet'},{name:'shubham'},{name:'kamal'},{name:'devesh'},{name:'ashu'
当我在这里使用useHistory钩子..。
import React from 'react';
import {View,Image,StyleSheet, TouchableOpacity} from 'react-native';
import theme from '../theme';
import Text from './Text'
import {useQuery} from '@apollo/react-hooks'
import {GET_REPOSITORY} from '../gr
我有一个带有不同卡片的屏幕(有文章信息)我试图按类别过滤文章当按下方便的类别时,我希望选择该类别,并显示属于该类别的文章,另一方面,当没有选择任何类别时,显示所有类别的所有文章(如果您看下面的图片,这将更有意义) 用于显示不同类别图片的代码: import TouchableScale from "react-native-touchable-scale";
import { category } from "../api/data";
import colors from "../config/colors";
function HotT
每次使用useEffect函数触发useScrollToTop时,我都试图滚动到屏幕的顶部。但是,当我试图在useEffect中使用该函数时,会出现以下错误:
Error: Invalid hook call. Hooks can only be called inside of the body of a function component. This could happen for one of the following reasons:
1. You might have mismatching versions of React and the renderer (such as
这是一个常见的问题,但不知怎的,我已经尝试了我能找到的所有解决方案,但仍然收到了这个警告。
VirtualizedList: You have a large list that is slow to update - make sure your renderItem
function renders components that follow React performance best practices like
PureComponent, shouldComponentUpdate, etc. {"contentLength": 5200, "dt
我正在使用redux工具箱方法中的api获取数据。我正在控制台中获取数据,但是我的钩子在页面加载时没有更新。
在这里输入代码
import { widthPercentageToDP as wp, heightPercentageToDP as hp } from 'react-native-responsive-screen';
import { useNavigation } from '@react-navigation/native';
import { Calendar } from 'react-native-calendars';
import {useState} from 'react'
const nav = () => {
const [activeNav, setActiveNav] = useState('#')
}
我想建个导航吧。我搞错了,我不知道为什么
React Hook "useState" is called in function "nav" that is neither a React function component nor a custom React Hook function. React compone
我想实现flatlist的多选功能。我直接在官方网站上修改了这个例子。官方网站地址是:。因为列表中有很多项,所以我想使用shouldComponentUpdate来防止过度呈现项。但是我发现react钩子编写方法不能实现多选,它不能保存选中的状态,但是类编写方法可以实现多选,原因是什么?FlatList项目的源码如下:
import {StyleSheet, Text, TouchableOpacity} from 'react-native';
import React, {Component} from 'react';
class Item ex