Flutter动态加载效果插件h3m_shimmer_card的使用

Flutter动态加载效果插件h3m_shimmer_card的使用

Shimmer Card #

这是一个在Flutter项目中轻松添加闪烁效果的插件。

演示 #

Shimmer Card 动画效果

使用方法 #

import 'package:h3m_shimmer_card/h3m_shimmer_card.dart';

ShimmerCard(
    width: 200,
    height: 100,
    beginAlignment: Alignment.topLeft,
    endAlignment: Alignment.bottomRight,
    backgroundColor: Colors.grey.shade800,
    shimmerColor: Colors.grey.shade700,
),

示例代码

import 'package:flutter/material.dart';
import 'package:h3m_shimmer_card/h3m_shimmer_card.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Shimmer Card Demo',
      theme: ThemeData.dark(),
      debugShowCheckedModeBanner: false,
      home: const MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key}) : super(key: key);

  [@override](/user/override)
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Shimmer Card'),
      ),
      body: GridView.builder(
        itemCount: 5,
        padding: const EdgeInsets.all(8),
        gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
          crossAxisCount: 1,
          mainAxisSpacing: 8,
          childAspectRatio: 1.2,
        ),
        itemBuilder: (context, index) => Column(
          children: [
            Expanded(
              child: ShimmerCard(
                beginAlignment: Alignment.topLeft,
                endAlignment: Alignment.bottomRight,
                backgroundColor: Colors.grey.shade800,
                shimmerColor: Colors.grey.shade700,
              ),
            ),
            const SizedBox(height: 8),
            Row(
              children: [
                ShimmerCard(
                  height: 48,
                  width: 48,
                  borderRadius: 48,
                  beginAlignment: Alignment.topLeft,
                  endAlignment: Alignment.bottomRight,
                  backgroundColor: Colors.grey.shade800,
                  shimmerColor: Colors.grey.shade700,
                ),
                const SizedBox(width: 8),
                Expanded(
                  child: Column(
                    children: [
                      Row(
                        children: [
                          Expanded(
                            child: ShimmerCard(
                              height: 12,
                              beginAlignment: Alignment.topLeft,
                              endAlignment: Alignment.bottomRight,
                              backgroundColor: Colors.grey.shade800,
                              shimmerColor: Colors.grey.shade700,
                            ),
                          ),
                          Expanded(child: Container()),
                        ],
                      ),
                      const SizedBox(height: 8),
                      Row(
                        children: [
                          Expanded(
                            flex: 2,
                            child: ShimmerCard(
                              height: 12,
                              beginAlignment: Alignment.topLeft,
                              endAlignment: Alignment.bottomRight,
                              backgroundColor: Colors.grey.shade800,
                              shimmerColor: Colors.grey.shade700,
                            ),
                          ),
                          Expanded(child: Container()),
                        ],
                      ),
                    ],
                  ),
                ),
              ],
            ),
          ],
        ),
      ),
    );
  }
}

更多关于Flutter动态加载效果插件h3m_shimmer_card的使用的实战教程也可以访问 https://www.itying.com/category-92-b0.html

1 回复

更多关于Flutter动态加载效果插件h3m_shimmer_card的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html


当然，以下是如何在Flutter项目中使用h3m_shimmer_card插件来实现动态加载效果的代码示例。h3m_shimmer_card插件提供了一种简便的方法来创建类似Facebook加载卡片时的动态闪烁效果。

首先，确保你的Flutter项目已经配置好，并且已经在pubspec.yaml文件中添加了h3m_shimmer_card依赖：

dependencies:
  flutter:
    sdk: flutter
  h3m_shimmer_card: ^最新版本号  # 替换为实际最新版本号

然后运行flutter pub get来安装依赖。

接下来，在你的Dart文件中，你可以这样使用h3m_shimmer_card：

import 'package:flutter/material.dart';
import 'package:h3m_shimmer_card/h3m_shimmer_card.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Shimmer Card Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  bool isDataLoaded = false;

  @override
  void initState() {
    super.initState();
    // 模拟数据加载
    Future.delayed(Duration(seconds: 2), () {
      setState(() {
        isDataLoaded = true;
      });
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Shimmer Card Demo'),
      ),
      body: Center(
        child: isDataLoaded
            ? _buildContentLoaded()
            : _buildShimmerEffect(),
      ),
    );
  }

  Widget _buildContentLoaded() {
    return Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: <Widget>[
        Card(
          child: Padding(
            padding: const EdgeInsets.all(16.0),
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: <Widget>[
                Text('Title', style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold)),
                SizedBox(height: 8),
                Text('This is a sample content that will be displayed once data is loaded.'),
              ],
            ),
          ),
        ),
        SizedBox(height: 20),
        // 可以添加更多卡片或其他内容
      ],
    );
  }

  Widget _buildShimmerEffect() {
    return Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: <Widget>[
        ShimmerCard(
          height: 150,
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: <Widget>[
              Container(
                height: 20,
                decoration: BoxDecoration(
                  color: Colors.grey[300]!,
                  borderRadius: BorderRadius.circular(8),
                ),
              ),
              SizedBox(height: 8),
              Container(
                height: 40,
                decoration: BoxDecoration(
                  color: Colors.grey[300]!,
                  borderRadius: BorderRadius.circular(4),
                ),
              ),
            ],
          ),
        ),
        SizedBox(height: 20),
        // 可以添加更多闪烁卡片或其他内容
      ],
    );
  }
}

在这个示例中：

  1. 我们创建了一个简单的Flutter应用，其中包含一个主屏幕MyHomePage。
  2. 在MyHomePage中，我们根据isDataLoaded状态来决定显示真实内容还是闪烁效果。
  3. 真实内容部分（_buildContentLoaded方法）简单地展示了一张卡片和一些文本。
  4. 闪烁效果部分（_buildShimmerEffect方法）使用了ShimmerCard来创建闪烁效果。

你可以根据实际需求调整闪烁卡片的高度和内容布局。这个示例提供了一个基本框架，你可以在此基础上进行扩展和自定义。

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