Flutter 中的响应式框架
2021-07-27 本文已影响0人
独立开发者猫哥
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猫哥说
这是个自动管理响应界面处理的组件，比较适合在 flutter web 的项目中。
自动管理了你的 Resizing、最大、最小尺寸、Scaling 缩放比例，但是我没有发现布局的控制，但是这已经很不错了，又可以少写代码了。
- 最小尺寸效果
https://gallery.codelessly.com/flutterwebsites/minimal/?utm_medium=link&utm_campaign=demo#/
- Flutter.dev 官网
https://gallery.codelessly.com/flutterwebsites/flutterwebsite/?utm_medium=link&utm_campaign=demo
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老铁记得 转发 ，猫哥会呈现更多 Flutter 好文~~~~
微信群 ducafecat
b 站 https://space.bilibili.com/404904528
原文
https://medium.com/flutterdevs/responsive-framework-in-flutter-74b8b2a360a9
代码
https://github.com/ducafecat/getx_quick_start
参考
正文
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Flutter 是 Google 的用户界面工具宝库，用于从一个代码库生成优秀的、本地编译的 iOS 和 Android 应用程序。为了构建任何应用程序，我们从小部件开始ー Flutter 应用程序的构建方块。窗口小部件根据当前的设计和状态描述他们的视图应该类似的内容。它整合了一个文本小部件、行小部件、列小部件、容器小部件等等。
本文利用 Flutter 响应框架软件包对 Flutter 响应框架进行了研究。有了软件包的帮助，我们可以很容易地实现一个响应屏幕。那么让我们开始吧。
响应式框架
响应式框架会自动调整你的用户界面以适应不同的屏幕尺寸。创建您的用户界面一次，并有它显示像素完美的移动，平板电脑和桌面！
支持多种显示大小通常意味着多次重新创建相同的布局。在传统的 Bootstrap 方法下，构建响应式 UI 是耗时、令人沮丧和重复的。此外，让一切像素完美几乎是不可能的，简单的编辑需要几个小时。
实施方案
- 第一步: 添加依赖项
将依赖项添加到 pubspec.yaml 文件。
依赖性:
dependencies:
responsive_framework: ^0.1.4
- 第二步: 导入
import 'package:responsive_framework/responsive_framework.dart';
- 第三步: 启用 AndriodX
org.gradle.jvmargs=-Xmx1536M
android.enableR8=true
android.useAndroidX=true
android.enableJetifier=true
代码实现
你需要分别在你的代码中实现它
在创建类似于响应式框架的 UI 之前，我们在 main 的 Material 应用部件中添加了 ResponsiveWrapper.builder() 。文件中初始化 MaxWith，MinWith 和 Breakpoints 的 List 类型，在它内部调整设备的大小，如移动设备，平板电脑，桌面，并且自动缩放值是定义的，让我们理解它与下面的代码引用。
ResponsiveWrapper.builder(
BouncingScrollWrapper.builder(context, widget!),
maxWidth: 1200,
minWidth: 450,
defaultScale: true,
breakpoints: [
ResponsiveBreakpoint.resize(450, name: MOBILE),
ResponsiveBreakpoint.autoScale(800, name: MOBILE),
ResponsiveBreakpoint.autoScale(800, name: TABLET),
ResponsiveBreakpoint.autoScale(1000, name: TABLET),
ResponsiveBreakpoint.resize(1200, name: DESKTOP),
ResponsiveBreakpoint.autoScale(2460, name: "4K"),
],
background: Container(color: Color(0xFFF5F5F5))
),
自动缩放按比例缩小和扩展布局，保持 UI 的精确外观。这就消除了手动调整布局以适应移动设备、平板电脑和桌面的需要。
在此之后，我们创建了一个用户配置文件屏幕，其中是用户的图像，以及两种不同类型的列表，其中图像和一些文本已经给出。
全部代码
import 'package:flutter/material.dart';
import 'package:responsive_framwork_demo/Constants/Constants.dart';
import 'package:responsive_framwork_demo/device_size.dart';
import 'package:responsive_framwork_demo/model/popular_course_model.dart';
import 'package:responsive_framwork_demo/model/result_model.dart';
class ProfileScreen extends StatefulWidget {
@override
_ProfileScreenState createState() => _ProfileScreenState();
}
class _ProfileScreenState extends State<ProfileScreen> {
late List<PopularCourseModel> popularCourseModel;
late List<ResultModel> resultModel;
@override
void initState() {
popularCourseModel = Constants.getPopularCourseModel();
resultModel = Constants.getResultModel();
super.initState();
}
@override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: Colors.white,
appBar: AppBar(
backgroundColor: Colors.white,
elevation: 0.0,
title: Text(
'PROFILE',
style: TextStyle(
fontFamily: 'Poppins Medium',
color: Colors.black,
fontSize: 15,
fontWeight: FontWeight.bold,
letterSpacing: 0.5),
),
centerTitle: true,
),
body: SingleChildScrollView(
child: Container(
padding: EdgeInsets.only(top: 20),
child: Column(
children: [
ClipOval(
child: CircleAvatar(
maxRadius: 50,
child: Image.asset(
'assets/images/mans_img.jpeg',
width: DeviceSize.width(context),
fit: BoxFit.fill,
),
),
),
SizedBox(
height: 30,
),
Text(
'Crowley Singer',
style: TextStyle(
fontFamily: 'Poppins Medium',
color: Colors.black,
fontSize: 15,
fontWeight: FontWeight.bold,
letterSpacing: 0.3),
),
Container(
margin: EdgeInsets.only(top: 25, left: 20, right: 20),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: [
Column(
children: [
Text(
'22',
style: TextStyle(
fontFamily: 'Poppins Medium',
color: Colors.black,
fontSize: 15,
fontWeight: FontWeight.bold,
letterSpacing: 0.5),
),
SizedBox(
height: 10,
),
Text(
'Courses',
style: TextStyle(
fontFamily: 'Poppins Regular',
color: Colors.black45,
fontSize: 11,
fontWeight: FontWeight.bold,
letterSpacing: 0.3),
),
],
),
Container(
height: 32,
width: 1,
color: Colors.black12,
),
Column(
children: [
Text(
'32',
style: TextStyle(
fontFamily: 'Poppins Medium',
color: Colors.black,
fontSize: 15,
fontWeight: FontWeight.bold,
letterSpacing: 0.5),
),
SizedBox(
height: 10,
),
Text(
'Mentors',
style: TextStyle(
fontFamily: 'Poppins Regular',
color: Colors.black45,
fontSize: 11,
fontWeight: FontWeight.bold,
letterSpacing: 0.3),
),
],
),
Container(
height: 32,
width: 1,
color: Colors.black12,
),
Column(
children: [
Text(
'48',
style: TextStyle(
fontFamily: 'Poppins Medium',
color: Colors.black,
fontSize: 15,
fontWeight: FontWeight.bold,
letterSpacing: 0.5),
),
SizedBox(
height: 10,
),
Text(
'Friends',
style: TextStyle(
fontFamily: 'Poppins Regular',
color: Colors.black45,
fontSize: 11,
fontWeight: FontWeight.bold,
letterSpacing: 0.3),
),
],
),
],
),
),
Container(
margin: EdgeInsets.only(top: 30, left: 20, right: 20),
height: 1,
color: Colors.black12,
width: DeviceSize.width(context),
),
Container(
margin: EdgeInsets.only(top: 30, left: 20, right: 20),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Text(
'YOUR COURSES',
style: TextStyle(
fontFamily: 'Poppins Medium',
color: Colors.black,
fontSize: 12,
fontWeight: FontWeight.w700,
letterSpacing: 0.5),
),
Icon(Icons.more_horiz),
],
),
),
Container(
margin: EdgeInsets.only(top: 10, left: 20, right: 20),
height: DeviceSize.height(context) / 7,
// color:Colors.purple,
child: ListView.separated(
separatorBuilder: (BuildContext context, int index) {
return SizedBox(width: 10);
},
scrollDirection: Axis.horizontal,
// padding:EdgeInsets.only(left:10),
//shrinkWrap: true,
itemCount: popularCourseModel.length,
itemBuilder: (BuildContext context, int index) {
return _buildYourCourseModel(
popularCourseModel[index], index);
},
),
),
Container(
margin: EdgeInsets.only(top: 30, left: 20, right: 20),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Text(
'YOUR PROGRESS',
style: TextStyle(
fontFamily: 'Poppins Medium',
color: Colors.black,
fontSize: 12,
fontWeight: FontWeight.w700,
letterSpacing: 0.5),
),
Icon(Icons.more_horiz),
],
),
),
Container(
// height:DeviceSize.height(context),
width: DeviceSize.width(context),
margin: EdgeInsets.only(top: 20),
child: ListView.separated(
separatorBuilder: (BuildContext context, int index) {
return SizedBox(height: 10);
},
scrollDirection: Axis.vertical,
// padding:EdgeInsets.only(left:10),
physics: NeverScrollableScrollPhysics(),
shrinkWrap: true,
itemCount: resultModel.length,
itemBuilder: (BuildContext context, int index) {
return _buildResultModel(resultModel[index], index);
},
),
),
],
),
),
),
);
}
Widget _buildYourCourseModel(PopularCourseModel items, int index) {
return Container(
width: 70,
child: Column(
//mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
Container(
decoration: BoxDecoration(
shape: BoxShape.circle,
color: Colors.white,
boxShadow: [
BoxShadow(
color: Colors.blueGrey.shade50,
offset: const Offset(
5.0,
5.0,
),
blurRadius: 10.0,
spreadRadius: 2.0,
), //BoxShadow
BoxShadow(
color: Colors.white,
offset: const Offset(0.0, 0.0),
blurRadius: 0.0,
spreadRadius: 0.0,
), //BoxShadow
],
),
child: ClipOval(
child: CircleAvatar(
backgroundColor: Colors.white,
maxRadius: 30,
// child:Image.asset('assets/images/earth.png',height:45,color:Colors.blueAccent,) ,
child: Padding(
padding: EdgeInsets.all(4),
child: Image.asset(
items.img,
fit: BoxFit.cover,
scale: 7,
),
),
),
),
),
Expanded(
child: Container(
padding: EdgeInsets.only(top: 0),
alignment: Alignment.center,
child: Text(
items.title,
style: TextStyle(
fontFamily: 'Poppins Medium',
fontWeight: FontWeight.w700,
letterSpacing: 0.3,
fontSize: 11,
color: Colors.black),
),
),
),
],
),
);
}
Widget _buildResultModel(ResultModel items, int index) {
return Container(
margin: EdgeInsets.only(left: 20, right: 20),
height: DeviceSize.height(context) / 9,
// / color:Colors.pink,
child: Row(
children: [
Container(
decoration: BoxDecoration(
shape: BoxShape.circle,
color: Colors.white,
boxShadow: [
BoxShadow(
color: Colors.blueGrey.shade50,
offset: const Offset(
5.0,
5.0,
),
blurRadius: 10.0,
spreadRadius: 2.0,
), //BoxShadow
BoxShadow(
color: Colors.white,
offset: const Offset(0.0, 0.0),
blurRadius: 0.0,
spreadRadius: 0.0,
), //BoxShadow
],
),
child: ClipOval(
child: CircleAvatar(
backgroundColor: Colors.white,
maxRadius: 28,
// child:Image.asset('assets/images/earth.png',height:45,color:Colors.blueAccent,) ,
child: Padding(
padding: EdgeInsets.all(4),
child: Image.asset(
items.img,
fit: BoxFit.cover,
scale: 7,
),
),
),
),
),
SizedBox(
width: 20,
),
Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
items.title,
style: TextStyle(
fontFamily: 'Poppins Medium',
color: Colors.black,
fontSize: 11.5,
fontWeight: FontWeight.w700,
letterSpacing: 0.5),
),
SizedBox(
height: 5,
),
Text(
items.subTitle,
style: TextStyle(
fontFamily: 'Poppins Regular',
color: Colors.black45,
fontSize: 11,
fontWeight: FontWeight.w700,
letterSpacing: 0.5),
),
],
),
],
),
);
}
}
总结
在这篇文章中，我解释了在 Flutter 响应框架，你可以根据自己的修改和实验，这个小介绍是从我们这边的 Flutter 响应框架演示。
© 猫哥
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