React Native App 內容現在顯示在模擬器上

Question

我正在研究從數據文件中獲取內容以顯示為包含圖像、標題和內容的新項目的本機反應，我創建了一個名為 Post 的組件，其中圖像、標題和內容作為道具，但是當我嘗試在 FlatList 上顯示時新聞項目不會顯示在模擬器上。 我不知道我做錯了什么，如果能得到一些指導，我將不勝感激。 以下是我的實現的文件和結構。 問題是我在模擬器窗口上得到一個空白屏幕！

數據.json

{

    "posts": [
        {
          "id" : 1,
          "title": "The Best Article Ever Written",
          "img": "https://i.imgur.com/mf9daCT.jpg",
          "content": "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum",
          "author": "Bob Labla"
        },
        {
          "id" : 2,
          "title": "Making the Best of Things",
          "img": "https://i.imgur.com/lxs9pM1.jpg",
          "content": "Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur.",
          "author": "Joe Shmo"
        },
        {
          "id" : 3,
          "title": "Why I'm Right and You're Wrong",
          "img": "https://i.imgur.com/UfXZnp4.jpg",
          "content": "At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga.",
          "author": "Mister Magoo"
        }
    ]
}

Post有 index.js 和 Style.js

index.js

import React from 'react';
import { Image, Text, TouchableOpacity, View} from 'react-native';

import styles from './styles';

const Post = ({ img, title, content }) => (
  <View style={styles.main}>
    <Image
      source={{ uri: img }}
      style={styles.image}
    />
    <View style={styles.content}>
      <Text style={styles.title}>{title}</Text>
      <Text>{content}</Text>
    </View>
    <TouchableOpacity style={styles.button} activeOpacity={0.8}>
      <Text style={styles.buttonText}>Read more</Text>
    </TouchableOpacity>
  </View>
);

export default Post;

styles.js

import { StyleSheet } from 'react-native';

const styles = StyleSheet.create({
  main: {
    backgroundColor: '#fff',
    borderRadius: 3,
    height: 340,
    margin: 5,
    width: 240,
  },
  image: {
    backgroundColor: '#ccc',
    height: 120,
    resizeMode: 'cover',
  },
  content: {
    padding: 10,
    overflow: 'hidden',
    zIndex: 1,
    flex: 1,
  },
  title: {
    fontSize: 18,
    marginBottom: 5,
  },
  button: {
    backgroundColor: '#1abc9c',
    borderRadius: 3,
    padding: 10,
    margin: 10,
  },
  buttonText: {
    color: '#fff',
    textAlign: 'center',
  },
});

export default styles;

Apps.js調用所有其他文件

//import { StatusBar } from 'expo-status-bar';
import React,{ Component } from 'react';
import { StyleSheet, Text, View, FlatList, SafeAreaView, StatusBar } from 'react-native';

import data from './data.json';
import Post from './Post';


export default function App (props) {
  
  console.log(data.posts[0])
  const renderItem = ({ item }) => {
    return (
      <View style={styles.container}>
         <View style={styles.toolbar}>
           <Text style={styles.title}>Latest posts</Text>
        </View> 
    
          {/* <Post {...post} />  */}
         <Post  img={item.img} title={item.title} content={item.content} />   
      </View>
    );
  }

  return (
    <SafeAreaView style={styles.container}>
       <FlatList
          data={data.posts}
          keyExtractor={item => item.id}
          renderItem={renderItem}
       />
    </SafeAreaView>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    marginTop: StatusBar.currentHeight || 0
  },
  toolbar: {
    backgroundColor: '#34495e',
    padding: 10,
    paddingTop: 20,
  },
  title: {
    color: '#fff',
    fontSize: 20,
    textAlign: 'center',
  },
  list: {
    backgroundColor: '#f0f3f4',
    paddingTop: 5,
    paddingBottom: 5,
    flex: 1
  },
  content: {
    flexDirection: 'row',
    flexWrap: 'wrap',
    justifyContent: 'center',
  },
})

Answer 1

在您的 data.json 中，在所有圖像附近添加 require() ，如下所示：

"img": require("https://i.imgur.com/mf9daCT.jpg")

並為發布圖像添加width styles