Flutter加载占位符动画插件shimmer_container的使用
Flutter加载占位符动画插件shimmer_container的使用
它将在您的应用中展示一个漂亮且可自定义的闪烁效果。您可以使用它来在从API加载数据时显示加载效果。

平台支持
Android | iOS | MacOS | Web | Linux | Windows |
---|---|---|---|---|---|
✔️ | ✔️ | ✔️ | ✔️ | ✔️ | ✔️ |
使用此包作为库
添加依赖
运行以下命令:
$ dart pub add shimmer_container
或者在Flutter项目中:
$ flutter pub add shimmer_container
这将会在您的包的pubspec.yaml
文件中添加一行(并运行隐式的dart pub get
):
dependencies:
shimmer_container: ^0.0.2
或者,您的编辑器可能支持dart pub get
或flutter pub get
。请查阅您的编辑器文档以了解更多信息。
导入
现在可以在您的Dart代码中使用:
import 'package:shimmer_container/shimmer_container.dart';
如何使用
[@override](/user/override)
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: ShimmerContainer(
height: 80,
width: 350,
radius: 4,
highlightColor: Color(0xffF9F9FB),
baseColor: Color(0xffE6E8EB),
),
),
);
}
完整示例
import 'dart:async';
import 'package:flutter/material.dart';
import 'shimmer_container.dart'; // 假设插件已经正确安装
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
[@override](/user/override)
Widget build(BuildContext context) {
return MaterialApp(
title: 'Shimmer Container Example',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const MyHomePage(title: 'Shimmer Container Example'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({super.key, required this.title});
final String title;
[@override](/user/override)
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
[@override](/user/override)
void initState() {
super.initState();
}
void safeSetState() {
if (mounted) {
setState(() {});
}
}
[@override](/user/override)
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: SingleChildScrollView(
child: Column(
children: [
ShimmerContainer(
height: 80,
width: 350,
radius: 4,
highlightColor: Color(0xffF9F9FB),
baseColor: Color(0xffE6E8EB),
),
SizedBox(height: 10,),
ShimmerContainer(
height: 80,
width: 350,
radius: 4,
highlightColor: Color(0xffF9F9FB),
baseColor: Color(0xffE6E8EB),
),
SizedBox(height: 10,),
ShimmerContainer(
height: 80,
width: 350,
radius: 4,
highlightColor: Color(0xffF9F9FB),
baseColor: Color(0xffE6E8EB),
),
SizedBox(height: 10,),
ShimmerContainer(
height: 80,
width: 350,
radius: 4,
highlightColor: Color(0xffF9F9FB),
baseColor: Color(0xffE6E8EB),
),
SizedBox(height: 10,),
ShimmerContainer(
height: 80,
width: 350,
radius: 4,
highlightColor: Color(0xffF9F9FB),
baseColor: Color(0xffE6E8EB),
),
SizedBox(height: 10,),
ShimmerContainer(
height: 80,
width: 350,
radius: 4,
highlightColor: Color(0xffF9F9FB),
baseColor: Color(0xffE6E8EB),
),
SizedBox(height: 10,),
ShimmerContainer(
height: 80,
width: 350,
radius: 4,
highlightColor: Color(0xffF9F9FB),
baseColor: Color(0xffE6E8EB),
),
SizedBox(height: 10,),
ShimmerContainer(
height: 80,
width: 350,
radius: 4,
highlightColor: Color(0xffF9F9FB),
baseColor: Color(0xffE6E8EB),
),
SizedBox(height: 10,),
ShimmerContainer(
height: 80,
width: 350,
radius: 4,
highlightColor: Color(0xffF9F9FB),
baseColor: Color(0xffE6E8EB),
),
SizedBox(height: 10,),
],
),
scrollDirection: Axis.vertical,
),
),
);
}
}
更多关于Flutter加载占位符动画插件shimmer_container的使用的实战教程也可以访问 https://www.itying.com/category-92-b0.html
更多关于Flutter加载占位符动画插件shimmer_container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中使用shimmer_container
插件来加载占位符动画的示例代码。shimmer_container
是一个用于创建占位符动画效果的Flutter插件,通常在数据加载时显示给用户一个视觉上的反馈。
首先,你需要在你的pubspec.yaml
文件中添加shimmer_container
依赖:
dependencies:
flutter:
sdk: flutter
shimmer_container: ^x.y.z # 请将x.y.z替换为最新版本号
然后运行flutter pub get
来安装依赖。
接下来,在你的Flutter应用中,你可以使用ShimmerContainer
来创建占位符动画。以下是一个完整的示例,展示如何在数据加载期间显示占位符动画:
import 'package:flutter/material.dart';
import 'package:shimmer_container/shimmer_container.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: Text('Shimmer Container Example'),
),
body: Center(
child: MyShimmerList(),
),
),
);
}
}
class MyShimmerList extends StatefulWidget {
@override
_MyShimmerListState createState() => _MyShimmerListState();
}
class _MyShimmerListState extends State<MyShimmerList> with SingleTickerProviderStateMixin {
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 Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
if (!isDataLoaded) {
ShimmerContainer(
height: 200,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
ShimmerItem(
baseColor: Colors.grey.withOpacity(0.3),
highlightColor: Colors.grey.withOpacity(0.6),
width: 200,
height: 20,
),
SizedBox(height: 10),
ShimmerItem(
baseColor: Colors.grey.withOpacity(0.3),
highlightColor: Colors.grey.withOpacity(0.6),
width: 150,
height: 20,
),
SizedBox(height: 10),
ShimmerItem(
baseColor: Colors.grey.withOpacity(0.3),
highlightColor: Colors.grey.withOpacity(0.6),
width: 200,
height: 20,
),
],
),
),
} else {
// 数据加载完成后显示的内容
ListView.builder(
shrinkWrap: true,
itemCount: 10,
itemBuilder: (context, index) {
return ListTile(
title: Text('Item ${index + 1}'),
);
},
),
},
],
);
}
}
在这个示例中,我们创建了一个简单的Flutter应用,其中包含一个ShimmerContainer
用于在数据加载期间显示占位符动画。当数据加载完成后(通过Future.delayed
模拟),我们更新状态并显示实际的数据列表。
ShimmerContainer
接收一个height
参数来设置容器的高度,并且包含一个子Widget
,通常是一个Column
,里面包含多个ShimmerItem
。ShimmerItem
用于定义单个占位符动画项,你可以设置它的baseColor
(基础颜色)和highlightColor
(高亮颜色),以及宽度和高度。
通过这种方式,你可以在Flutter应用中轻松实现占位符动画效果,从而提升用户体验。