如何更改点击时查看内容 - React Native答案

【问题标题】：How to change View Content On Click - React Native如何更改点击时查看内容 - React Native
【发布时间】：2022-11-30 14:49:31
【问题描述】：

我一直在尝试替换视图反应本机，但没有成功。每当我尝试 <TouchableOpacity onPress={() => {handleChangeMyView();}}> 时，应用程序都会无错误地关闭：

我究竟做错了什么？我怎样才能让它发挥作用？

谢谢大家。

import React, {
  useState
} from 'react';

import {
  SafeAreaView,
  View,
  TouchableOpacity,
} from 'react-native';

import MyInitialView from './MyInitialView';

const SiteContainer = () => {
  let MyDynamicView = () => {
    return (
      <View></View>
    );
  };

  const [MyDynamicViewArea, setMyDynamicViewArea] = useState(MyInitialView);

  const handleChangeMyView = () => {
    setMyDynamicViewArea(MyDynamicView);
  };

  return (
    <SafeAreaView style={styles.siteContainer}>
      {MyDynamicViewArea}
      <TouchableOpacity onPress={() => {handleChangeMyView();}}>
        <View>
          <FontAwesome name="quote-left"></FontAwesome>
        </View>
      </TouchableOpacity>
    </SafeAreaView>
  );
};

export default SiteContainer;

我的初始视图:

import React from 'react';

import {
  View
} from 'react-native';

export default function MyInitialView() {
  return (
    <View></View>
  );
}

【问题讨论】：

标签： reactjs react-native react-hooks

【解决方案1】：

您可以使用布尔值使用 useState 查看 MyInitialView

  const [toViewMyInitialView, setToViewMyInitialView] = useState(false);

并在 handleChangeMyView 函数中将上述值设置为 true

  const handleChangeMyView = () => {
    setToViewMyInitialView(true);
  };

在 SiteContainer 中

<SafeAreaView style={styles.siteContainer}>
      // here I don't know a way to display a component in react-native, so 
      // you need to display the component MyInitialView if the 
      // toViewMyInitialView is true and when toViewMyInitialView id false it 
      // display MyDynamicViewArea    
                                                                                                                                            
      {toViewMyInitialView && <MyInitialView/>}
       {!toViewMyInitialView && <MyDynamicViewArea/>}
      <TouchableOpacity onPress={() => {handleChangeMyView()}}>
        <View>
          <FontAwesome name="quote-left"></FontAwesome>
        </View>
      </TouchableOpacity>
    </SafeAreaView>

【讨论】：