javascript - 不确定如何将对象内容映射到应用程序中显示

Question

我想在我的应用程序的前端显示对象的内容。对象控制台日志如下 -

我想通过将“dashboardTitle”映射到我的应用程序中每个屏幕的 AppHeader 来显示它。我已尝试执行以下操作，但以下都不会呈现“dashboardTitle”。

const [filtered, setFiltered] = useState([]);

{filtered.map(item => (
  <Text style={styles.headerText}>
    {item.dashboardName} - {item.dashboardTitle}
  </Text>
))}
{filtered.map((item, index)=>(
 <Text style={styles.headerText} key={index}>
   {item.dashboardName}
 </Text>  
))}
{messages.map((message, key)=>(
 <Text style={styles.headerText}>
   {message.dashboardName}
 </Text>  
))}

这是完整的 AppHeader 代码-

import React, { useState, useEffect, useReducer } from 'react';
import { View, Text, StyleSheet, FlatList, ActivityIndicator, Keyboard, Button } from 'react-native';
import { Searchbar } from 'react-native-paper';
import { theme } from '../theme';
import MaterialIcons from 'react-native-vector-icons/MaterialIcons';
import { TouchableOpacity } from 'react-native-gesture-handler';
import { apiStateReducer } from '../reducers/ApiStateReducer';
import CognitensorEndpoints from '../services/network/CognitensorEndpoints';
import DefaultView from '../components/default/DefaultView';
import DashboardListCard from '../components/DashboardListCard';
import DashboardHeader from '../components/DashboardHeader';
import DashboardGridCard from '../components/DashboardGridCard';
import {
  NavigationContainer,
  useFocusEffect,
} from '@react-navigation/native';
import { createStackNavigator } from '@react-navigation/stack';
import { createBottomTabNavigator } from '@react-navigation/bottom-tabs';

const AppHeader = ({
  scene,
  previous,
  navigation,
  searchIconVisible = false,
  item,
  index,
  onPress
}) => {
  const [dashboards, dispatchDashboards] = useReducer(apiStateReducer, {
    data: [],
    isLoading: true,
    isError: false,
  });
  const [gridView, setGridView] = useState(false);

  const toggleGridView = () => {
    setGridView(!gridView);
  };

  const [filtered, setFiltered] = useState([]);

  const setLoading = () => {
  const messages = dashboards.data.message.filter((item) => {
      const title = item.dashboardTitle || item.dashboardName;
      return title.toLowerCase();
    });
    setFiltered(messages);
    console.log(filtered);
  };

  const dropShadowStyle = styles.dropShadow;
  const toggleSearchVisibility = () => {
    navigation.navigate('Search');
  };

  useEffect(() => {
    console.log('abcd');
    setLoading();
    CognitensorEndpoints.getDashboardList({
      dispatchReducer: dispatchDashboards,
    });
    CognitensorEndpoints.getList({
      dispatchReducer: dispatchDashboards,
    });
  },[]);

  return (
    <>
    <View style={styles.header}>
      <View style={styles.headerLeftIcon}>
        <TouchableOpacity onPress={navigation.pop}>
          {previous ? (
            <MaterialIcons
              name="chevron-left"
              size={24}
              style={styles.visible}
            />
          ) : (
            <MaterialIcons
              name="chevron-left"
              size={24}
              style={styles.invisible}
            />
            )}
        </TouchableOpacity>
      </View>
      {filtered.map(item => (
      <Text style={styles.headerText}>
        {item.dashboardTitle}
      </Text>
    ))}
      <View style={styles.headerRightIconContainer}>
        {searchIconVisible ? (
          <TouchableOpacity
            style={[styles.headerRightIcon, dropShadowStyle]}
            onPress={toggleSearchVisibility}>
            <MaterialIcons name="search" size={24} style={styles.visible} />
          </TouchableOpacity>
        ) : (
          <View style={styles.invisible} />
        )}
      </View>
    </View>
  </>
  );
};

标签： javascriptreact-native