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Javascript Haw映射此数组中的所有名称_Javascript_Arrays_Reactjs_React Native_React Native Flatlist - Fatal编程技术网

Javascript Haw映射此数组中的所有名称

Javascript Haw映射此数组中的所有名称,javascript,arrays,reactjs,react-native,react-native-flatlist,Javascript,Arrays,Reactjs,React Native,React Native Flatlist,import React,{useState}来自“React”; 从“react native”导入{View,StyleSheet,Button,FlatList,SectionList}; 从“本机库”导入{Item,Input,Container,Header,List,ListItem,Text,Left,Right,Icon}; const NigLawList=({navigation})=>{ const[people,setPeople]=useState([ {法律:“证据法

import React,{useState}来自“React”;
从“react native”导入{View,StyleSheet,Button,FlatList,SectionList};
从“本机库”导入{Item,Input,Container,Header,List,ListItem,Text,Left,Right,Icon};
const NigLawList=({navigation})=>{
const[people,setPeople]=useState([
{法律:“证据法”,编号:“1”,
部分:[{名称:“引言1”,意思是:“你好吗”},
{名称:“引言2”,意思是:“你好吗”}
]},
])
返回(
项目id}
数据={people}
renderItem={({item})=>(
navigation.navigate('NigLawParts',item)}>
{项目.法律}
)}
keyExtractor={(项,索引)=>index.toString()}
/>
);
}

导出默认列表以下是如何呈现
法则
键的内容以及
部分
数组中相应的名称

我省略了
列表
列表项
组件

代码:


const NigLawList=({navigation})=>{
const[people,setPeople]=useState([
{
法律:“证据法”,
id:“1”,
第部分:[
{name:“引言cc”,意思是:“你好吗?”,
{名称:“简介bb”,意思是:“你好吗,
],
},
]);
返回(
项目id}
数据={people}
renderItem={({item})=>(
{项目.法律}
{item.part.map((名称)=>(
{name.name}
))}
)}
keyExtractor={(项,索引)=>index.toString()}
/>
);
};
导出默认列表;
也请阅读文档以了解更多信息:

输出:

使用参数导航到下一屏幕的代码:


import React, { useState } from "react";
import {
  StyleSheet,
  Text,
  View,
  FlatList,
  TouchableOpacity,
} from "react-native";
import { NavigationContainer, StackActions } from "@react-navigation/native";
import { createStackNavigator } from "@react-navigation/stack";

import { SafeAreaView } from "react-native-safe-area-context";

const Stack = createStackNavigator();

const NigLawList = ({ navigation }) => {
  const [people, setPeople] = useState([
    {
      Law: "Evidence Act",
      id: "1",
      part: [
        { name: "Introduction cc", meaning: "how are you don" },
        { name: "Introduction bb", meaning: "how are you don" },
      ],
    },
  ]);

  return (
    <SafeAreaView style={{ marginTop: 20 }}>
      <FlatList
        numColumns={1}
        keyExtractor={(item) => item.id}
        data={people}
        renderItem={({ item }) => (
          <TouchableOpacity
            onPress={() => navigation.navigate("Names", { parts: item.part })}
          >
            <View>
              <Text
                style={{
                  fontSize: 20,
                }}
              >
                {item.Law}
              </Text>
              {/* {item.part.map((name) => (
                <Text>{name.name}</Text>
              ))} */}
            </View>
          </TouchableOpacity>
        )}
        keyExtractor={(item, index) => index.toString()}
      />
    </SafeAreaView>
  );
};

const NamesScreen = ({ navigation, route }) => {
  const { parts } = route.params;
  return (
    <SafeAreaView>
      {parts.map((part) => (
        <TouchableOpacity
          key={part.name}
          onPress={() =>
            navigation.navigate("Meaning", { meaning: part.meaning })
          }
        >
          <Text
            style={{
              fontSize: 20,
            }}
          >
            {part.name}
          </Text>
        </TouchableOpacity>
      ))}
    </SafeAreaView>
  );
};

const MeaningScreen = ({ route }) => {
  const { meaning } = route.params;
  return (
    <SafeAreaView>
      <Text
        style={{
          fontSize: 20,
          marginTop: 20,
        }}
      >
        {meaning}
      </Text>
    </SafeAreaView>
  );
};

export default function App() {
  return (
    <View style={styles.container}>
      <NavigationContainer>
        <Stack.Navigator>
          <Stack.Screen name="NigLawList" component={NigLawList} />
          <Stack.Screen name="Names" component={NamesScreen} />
          <Stack.Screen name="Meaning" component={MeaningScreen} />
        </Stack.Navigator>
      </NavigationContainer>
    </View>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
  },
});


从“React”导入React,{useState};
进口{
样式表,
文本,
看法
平面列表,
可触摸不透明度,
}从“反应本族语”;
从“@react navigation/native”导入{NavigationContainer,StackActions}”;
从“@react navigation/stack”导入{createStackNavigator};
从“反应本机安全区域上下文”导入{SafeAreaView};
const Stack=createStackNavigator();
const NigLawList=({navigation})=>{
const[people,setPeople]=useState([
{
法律:“证据法”,
id:“1”,
第部分:[
{name:“引言cc”,意思是:“你好吗?”,
{名称:“简介bb”,意思是:“你好吗,
],
},
]);
返回(
项目id}
数据={people}
renderItem={({item})=>(
导航(“名称”{parts:item.part})}
>
{项目.法律}
{/*{item.part.map((名称)=>(
{name.name}
))} */}
)}
keyExtractor={(项,索引)=>index.toString()}
/>
);
};
常量名称屏幕=({导航,路由})=>{
const{parts}=route.params;
返回(
{parts.map((part)=>(
navigation.navigate(“含义”,{含义:part.meansion})
}
>
{part.name}
))}
);
};
常量含义屏幕=({route})=>{
const{meansion}=route.params;
返回(
{意义}
);
};
导出默认函数App(){
返回(
);
}
const styles=StyleSheet.create({
容器:{
弹性:1,
},
});
输出:


下面是列表在我的emulator中的显示方式的短屏幕
请考虑格式化您的源代码并改正您的问题中的键位。您想在哪里显示姓名?在同一列表项中,还是应该是单独的列表?你的要求不清楚。非常感谢你的答复。我想在同一个列表中显示它。请原谅我。。我是新来的土生土长的。你好,肯坦!你能帮帮我吗。如何在新屏幕中传递“名称”并在该屏幕的另一个平面列表中显示。我可以将名称传递到另一个屏幕,但我可以在新列表中显示它们。现在我不在笔记本电脑旁,因此无法发送工作代码,我回家后会将其发布。同时仔细阅读这些文档:我希望您通过参数传递实现了导航,如果您还没有,请查看更新的代码。这很好,先生。但是有一个小问题。名字显示在这里的一行中。我不显示为列表。若要在一行中删除这两个
名称
,请删除外部
组件,并仅在该容器中保留
{parts.map((name)=>({name.name}))}

import React, { useState } from "react";
import {
  StyleSheet,
  Text,
  View,
  FlatList,
  TouchableOpacity,
} from "react-native";
import { NavigationContainer, StackActions } from "@react-navigation/native";
import { createStackNavigator } from "@react-navigation/stack";

import { SafeAreaView } from "react-native-safe-area-context";

const Stack = createStackNavigator();

const NigLawList = ({ navigation }) => {
  const [people, setPeople] = useState([
    {
      Law: "Evidence Act",
      id: "1",
      part: [
        { name: "Introduction cc", meaning: "how are you don" },
        { name: "Introduction bb", meaning: "how are you don" },
      ],
    },
  ]);

  return (
    <SafeAreaView style={{ marginTop: 20 }}>
      <FlatList
        numColumns={1}
        keyExtractor={(item) => item.id}
        data={people}
        renderItem={({ item }) => (
          <TouchableOpacity
            onPress={() => navigation.navigate("Names", { parts: item.part })}
          >
            <View>
              <Text
                style={{
                  fontSize: 20,
                }}
              >
                {item.Law}
              </Text>
              {/* {item.part.map((name) => (
                <Text>{name.name}</Text>
              ))} */}
            </View>
          </TouchableOpacity>
        )}
        keyExtractor={(item, index) => index.toString()}
      />
    </SafeAreaView>
  );
};

const NamesScreen = ({ navigation, route }) => {
  const { parts } = route.params;
  return (
    <SafeAreaView>
      {parts.map((part) => (
        <TouchableOpacity
          key={part.name}
          onPress={() =>
            navigation.navigate("Meaning", { meaning: part.meaning })
          }
        >
          <Text
            style={{
              fontSize: 20,
            }}
          >
            {part.name}
          </Text>
        </TouchableOpacity>
      ))}
    </SafeAreaView>
  );
};

const MeaningScreen = ({ route }) => {
  const { meaning } = route.params;
  return (
    <SafeAreaView>
      <Text
        style={{
          fontSize: 20,
          marginTop: 20,
        }}
      >
        {meaning}
      </Text>
    </SafeAreaView>
  );
};

export default function App() {
  return (
    <View style={styles.container}>
      <NavigationContainer>
        <Stack.Navigator>
          <Stack.Screen name="NigLawList" component={NigLawList} />
          <Stack.Screen name="Names" component={NamesScreen} />
          <Stack.Screen name="Meaning" component={MeaningScreen} />
        </Stack.Navigator>
      </NavigationContainer>
    </View>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
  },
});