10Flutter页面布局 Padding Row Column Expanded组件详解：
2024-09-29 02:11:05
Padding组件：
main.dart
import 'package:flutter/material.dart';
import 'res/listData.dart';
/*
flutter页面布局Padding Row Column Expanded组件详情：
*/ void main() {
runApp(MyApp());
} class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
// TODO: implement build
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: Text('Padding Row Column Expanded'),
),
body: HomeContent(),
),
);
}
} class HomeContent extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Padding(
padding: EdgeInsets.fromLTRB(, , , ),
child: GridView.count(
crossAxisCount: ,
childAspectRatio: 1.7,
children: <Widget>[
Padding(
padding: EdgeInsets.fromLTRB(, , , ),
child: Image.network("https://www.itying.com/images/flutter/1.png",
fit: BoxFit.cover),
),
Padding(
padding: EdgeInsets.fromLTRB(, , , ),
child: Image.network("https://www.itying.com/images/flutter/1.png",
fit: BoxFit.cover),
),
Padding(
padding: EdgeInsets.fromLTRB(, , , ),
child: Image.network("https://www.itying.com/images/flutter/1.png",
fit: BoxFit.cover),
),
Padding(
padding: EdgeInsets.fromLTRB(, , , ),
child: Image.network("https://www.itying.com/images/flutter/1.png",
fit: BoxFit.cover),
),
Padding(
padding: EdgeInsets.fromLTRB(, , , ),
child: Image.network("https://www.itying.com/images/flutter/1.png",
fit: BoxFit.cover),
)
],
),
);
}
}
Row水平布局组件：
import 'package:flutter/material.dart';
import 'res/listData.dart';
/*
flutter页面布局Padding Row Column Expanded组件详情：
Row水平布局组件：
mainAxisAlignment 主轴的排序方式
crossAxisAlignment 次轴的排序方式
children 组件子元素：
*/ void main() {
runApp(MyApp());
} class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
// TODO: implement build
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: Text('Padding Row Column Expanded'),
),
body: HomeContent(),
),
);
}
} class HomeContent extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Container(
height: 800.0,
width: 400.0,
color: Colors.pink,
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
IconContainer(Icons.home, color: Colors.blue),
IconContainer(Icons.search, color: Colors.orange),
IconContainer(Icons.select_all, color: Colors.red)
],
),
);
}
} class IconContainer extends StatelessWidget {
double size = 32.0;
Color color = Colors.red;
IconData icon;
IconContainer(this.icon, {this.color, this.size}) {}
@override
Widget build(BuildContext context) {
// TODO: implement build
return Container(
height: 100.0,
width: 100.0,
color: this.color,
child: Center(
child: Icon(this.icon, size: this.size, color: Colors.white),
),
);
}
}
Column 垂直布局：
import 'package:flutter/material.dart';
import 'res/listData.dart';
/*
flutter页面布局Padding Row Column Expanded组件详情：
Column水平布局组件：
mainAxisAlignment 主轴的排序方式
crossAxisAlignment 次轴的排序方式
children 组件子元素：
*/ void main() {
runApp(MyApp());
} class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
// TODO: implement build
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: Text('Padding Row Column Expanded'),
),
body: HomeContent(),
),
);
}
} class HomeContent extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Container(
height: 800.0,
width: 400.0,
color: Colors.pink,
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
IconContainer(Icons.home, color: Colors.blue),
IconContainer(Icons.search, color: Colors.orange),
IconContainer(Icons.select_all, color: Colors.red)
],
),
);
}
} class IconContainer extends StatelessWidget {
double size = 32.0;
Color color = Colors.red;
IconData icon;
IconContainer(this.icon, {this.color, this.size}) {}
@override
Widget build(BuildContext context) {
// TODO: implement build
return Container(
height: 100.0,
width: 100.0,
color: this.color,
child: Center(
child: Icon(this.icon, size: this.size, color: Colors.white),
),
);
}
}
Expanded
import 'package:flutter/material.dart';
import 'res/listData.dart';
/*
Flutter Expanded类似Web中的Flex布局：
flex:元素占整个父Row/Column的比例：
child 子元素 */ void main() {
runApp(MyApp());
} class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
// TODO: implement build
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: Text('Padding Row Column Expanded'),
),
body: HomeContent(),
),
);
}
} class HomeContent extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Row(
children: <Widget>[
// Expanded(
// flex: 1,
// child: IconContainer(Icons.search,color:Colors.blue),
// ),
// Expanded(
// flex: 2,
// child: IconContainer(Icons.home,color:Colors.orange),
// ),
// Expanded(
// flex: 1,
// child: IconContainer(Icons.select_all,color:Colors.red),
// ) Expanded(
flex: ,
child: IconContainer(Icons.home,color:Colors.orange),
),
IconContainer(Icons.search,color:Colors.blue)
],
);
}
} class IconContainer extends StatelessWidget {
double size = 32.0;
Color color = Colors.red;
IconData icon;
IconContainer(this.icon, {this.color, this.size}) {}
@override
Widget build(BuildContext context) {
// TODO: implement build
return Container(
height: 100.0,
width: 100.0,
color: this.color,
child: Center(
child: Icon(this.icon, size: this.size, color: Colors.white),
),
);
}
}
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