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javascript - React-Native Javascript 搜索过滤功能

问题描述

我正在尝试在此数组中搜索这些成分并将值添加到data以显示它，但它不起作用。我对javascript很陌生，所以如果有人能帮助我，我将不胜感激。这就是我所做的：

const Search = () => {
  const ingridients = [ ["paprika", "parsley"], ["steak", "ground beef"],["milk", "eggs", "cheese"] ]
  const [input, setInput] = useState();

  const categorize = (term) => {
    setInput(ter )
    let data = []
    if (term) {
      const newData = ingridients.filter(() => {
        if (RegExp(searchTerm, "gim").exec())
            return RegExp(searchTerm, "gim").exec()
      }) 
    } else {
      data = []
    }
  }
  return(
      <TextInput onChange={(text)=> categorize(text)} value={input}/>
  )
}

标签： javascriptarraysreact-nativesearch

解决方案

你的意思是这样的吗？

import React, { useState } from 'react';
import { Text, TextInput, View } from 'react-native';

export default function App() {
  const ingridients = [
    'paprika',
    'parsley',
    'steak',
    'ground beef',
    'milk',
    'eggs',
    'cheese',
  ];
  const [input, setInput] = useState();
  const [filteredData, setFilteredData] = useState([]);

  const filter = (term) => {
    setInput(term);
    if(/\d/.test(term) || /[a-zA-Z]/.test(term)) {
        setFilteredData(ingridients.filter(ingridient => ingridient.includes(term)));
    } 
    else {
       setFilteredData([]);
    }
  };
  return (
    <React.Fragment>
      <TextInput
        onChangeText={(text) => filter(text)}
        value={input}
        style={{ backgroundColor: 'grey' }}
      />
      <View style={{ padding: 40 }}>
        {filteredData.map(ingridient => (
          <Text style={{ color: 'black' }}>{ingridient}</Text>
        ))}
      </View>
    </React.Fragment>
  );
}

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