如何确保我在颤动中的图像 url 不会显示在屏幕上而不是图像上？

Posted 2023-03-22

【中文标题】如何确保我在颤动中的图像 url 不会显示在屏幕上而不是图像上？

【英文标题】：How do I ensure that the url of my image in flutter doesn't show up on the screen instead of the image?

【发布时间】：2021-12-17 11:45:27

【问题描述】：

我是新来的颤振。我试图让一些植物的图片出现在特定植物的名称旁边，但是我得到的是 url，有没有可能的方法可以在下面的代码中解决这个问题？

import 'package:flutter/material.dart';

class ProfilePage extends StatefulWidget 
  const ProfilePage(Key? key) : super(key: key);

  @override
  _ProfilePageState createState() => _ProfilePageState();


class _ProfilePageState extends State<ProfilePage> 
  // This holds a list of fiction users
  // You can use data fetched from a database or a server as well
  final List<Map<String, dynamic>> _allHerbs = [
    
      "id": 1,
      "name": "plant1",
      "urlImage":
          'https://www.southernexposure.com/media/products/originals/sweet-genovese-basil-809aaf7e3d9a3f3fa7ce2f0eb4480e95.jpg'
    ,
    "id": 2, "name": "plant2", "urlImage": '',
    "id": 3, "name": "plant3", "urlImage": '',
    "id": 4, "name": "plant4", "urlImage": '',
    "id": 5, "name": "plant5", "urlImage": '',
    "id": 6, "name": "plant6", "urlImage": '',
    "id": 7, "name": "plant7", "urlImage": '',
    "id": 8, "name": "plant8", "urlImage": '',
    "id": 9, "name": "plant9", "urlImage": '',
    "id": 10, "name": "plant10", "urlImage": '',
  ];

  // This list holds the data for the list view
  List<Map<String, dynamic>> _foundHerbs = [];
  @override
  initState() 
    // at the beginning, all users are shown
    _foundHerbs = _allHerbs;
    super.initState();
  

  // This function is called whenever the text field changes
  void _runFilter(String enteredKeyword) 
    List<Map<String, dynamic>> results = [];
    if (enteredKeyword.isEmpty) 
      // if the search field is empty or only contains white-space, we'll display all users
      results = _allHerbs;
     else 
      results = _allHerbs
          .where((user) =>
              user["name"].toLowerCase().contains(enteredKeyword.toLowerCase()))
          .toList();
      // we use the toLowerCase() method to make it case-insensitive
    

    // Refresh the UI
    setState(() 
      _foundHerbs = results;
    );
  

  @override
  Widget build(BuildContext context) 
    return Scaffold(
      appBar: AppBar(
        title: const Text('Herb Search'),
      ),
      body: Padding(
        padding: const EdgeInsets.all(10),
        child: Column(
          children: [
            const SizedBox(
              height: 20,
            ),
            TextField(
              onChanged: (value) => _runFilter(value),
              decoration: const InputDecoration(
                  labelText: 'Search', suffixIcon: Icon(Icons.search)),
            ),
            const SizedBox(
              height: 20,
            ),
            Expanded(
              child: _foundHerbs.isNotEmpty
                  ? ListView.builder(
                      itemCount: _foundHerbs.length,
                      itemBuilder: (context, index) => Card(
                        key: ValueKey(_foundHerbs[index]["id"]),
                        color: Colors.blueAccent,
                        elevation: 4,
                        margin: const EdgeInsets.symmetric(vertical: 10),
                        child: ListTile(
                          leading: Text(
                            _foundHerbs[index]["id"].toString(),
                            style: const TextStyle(fontSize: 24),
                          ),
                          title: Text(_foundHerbs[index]['name']),
                          subtitle: Text('$_foundHerbs[index]["urlImage"] '),
                        ),
                      ),
                    )
                  : const Text(
                      'No results found',
                      style: TextStyle(fontSize: 24),
                    ),
            ),
          ],
        ),
      ),
    );
  

【参考方案1】：

您希望从您只需要的文本小部件中获取图像

改变这个

subtitle: Text('$_foundHerbs[index]["urlImage"] '),

到这里

subtitle: Image.network('$_foundHerbs[index]["urlImage"] '),

上面将在标题下显示您的图像，但如果您想在旁边显示它，请使用前导或尾随而不是副标题

喜欢这个

leading: Image.network('$_foundHerbs[index]["urlImage"] '),

【讨论】：

点击图片时如何显示图片信息？

列表图块具有点击功能，因此您可以使用它并传递内容以显示更多信息