Animation 更改颤振时动画的方向
我得到了一个名为flatter\u flip\u view的插件。它工作得很好,但我想改变动画的方向。我想控制它是从右向左还是从左向右。 这是链接。有人知道怎么做吗?Animation 更改颤振时动画的方向,animation,flutter,mobile,dart,Animation,Flutter,Mobile,Dart,我得到了一个名为flatter\u flip\u view的插件。它工作得很好,但我想改变动画的方向。我想控制它是从右向左还是从左向右。 这是链接。有人知道怎么做吗? 谢谢大家。您可以使用参数goBackDirection和goFrontDirection控制值AxisDirection.right和AxisDirection.left 代码片段 FlipView( animationController: _curvedAnimation,
谢谢大家。您可以使用参数
goBackDirection
和goFrontDirection
控制值AxisDirection.right
和AxisDirection.left
代码片段
FlipView(
animationController: _curvedAnimation,
front: _buildCard('A', () => _flip(true)),
back: _buildCard('B', () => _flip(false)),
goBackDirection: AxisDirection.right,
goFrontDirection: AxisDirection.right,
)
工作演示
完整代码
import 'package:flutter/material.dart';
import 'package:flutter_flip_view/flutter_flip_view.dart';
class SimpleExample extends StatefulWidget {
@override
_SimpleExampleState createState() => _SimpleExampleState();
}
class _SimpleExampleState extends State<SimpleExample>
with SingleTickerProviderStateMixin {
AnimationController _animationController;
Animation<double> _curvedAnimation;
@override
void initState() {
super.initState();
_animationController = AnimationController(
vsync: this, duration: Duration(milliseconds: 1000));
_curvedAnimation =
CurvedAnimation(parent: _animationController, curve: Curves.easeInOut);
}
@override
void dispose() {
_animationController.dispose();
super.dispose();
}
void _flip(bool reverse) {
if (_animationController.isAnimating) return;
if (reverse) {
_animationController.forward();
} else {
_animationController.reverse();
}
}
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
body: Padding(
padding: const EdgeInsets.all(16.0),
child: Center(
child: FlipView(
animationController: _curvedAnimation,
front: _buildCard('A', () => _flip(true)),
back: _buildCard('B', () => _flip(false)),
goBackDirection: AxisDirection.right,
goFrontDirection: AxisDirection.right,
),
),
),
),
);
}
Widget _buildCard(String title, GestureTapCallback onTap) {
return AspectRatio(
aspectRatio: 0.7,
child: Card(
elevation: 4,
clipBehavior: Clip.hardEdge,
shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(16)),
child: Container(
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(16),
gradient: LinearGradient(
colors: [
Color(0xff92ffc0),
Color(0Xff002661),
],
begin: Alignment.topLeft,
end: Alignment.bottomRight,
),
),
child: Material(
color: Colors.transparent,
child: InkWell(
splashColor: Colors.white.withOpacity(0.1),
highlightColor: Colors.transparent,
borderRadius: BorderRadius.circular(8),
onTap: onTap,
child: Center(
child: Container(
width: 48,
height: 48,
alignment: Alignment.center,
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(60),
color: Colors.amber,
),
child: Text(
title,
style: TextStyle(
fontSize: 24,
color: Colors.white,
fontWeight: FontWeight.bold,
),
),
),
),
),
),
),
),
);
}
}
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: SimpleExample(),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
void _incrementCounter() {
setState(() {
_counter++;
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
'You have pushed the button this many times:',
),
Text(
'$_counter',
style: Theme.of(context).textTheme.display1,
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: Icon(Icons.add),
),
);
}
}
导入“包装:颤振/材料.省道”;
导入“package:flatter_flip_view/flatter_flip_view.dart”;
类SimpleExample扩展StatefulWidget{
@凌驾
_SimpleExampleState createState()=>\u SimpleExampleState();
}
类\u SimpleExampleState扩展状态
使用SingleTickerProviderStateMixin{
AnimationController _AnimationController;
动画-曲线动画;
@凌驾
void initState(){
super.initState();
_animationController=animationController(
vsync:this,duration:duration(毫秒:1000));
_曲线化=
曲线动画(父对象:_animationController,曲线:Curves.easeInOut);
}
@凌驾
无效处置(){
_animationController.dispose();
super.dispose();
}
无效翻转(布尔反转){
如果(_animationController.isAnimating)返回;
如果(反向){
_animationController.forward();
}否则{
_animationController.reverse();
}
}
@凌驾
小部件构建(构建上下文){
返回材料PP(
家:脚手架(
主体:填充物(
填充:常数边集全部(16.0),
儿童:中心(
孩子:FlipView(
动画控制器:_曲线动画,
正面:_buildCard('A',()=>_flip(true)),
背面:_buildCard('B',()=>_flip(false)),
goBackDirection:AxisDirection.right,
goFrontDirection:AxisDirection.right,
),
),
),
),
);
}
小部件构建卡(字符串标题、手势TapCallback onTap){
返回AspectRatio(
方面:0.7,
孩子:卡片(
标高:4,
clipBehavior:Clip.hardEdge,
形状:RoundedRectangleBorder(borderRadius:borderRadius.circular(16)),
子:容器(
装饰:盒子装饰(
边界半径:边界半径。圆形(16),
梯度:线性梯度(
颜色:[
颜色(0xff92ffc0),
颜色(0Xff002661),
],
开始:Alignment.topLeft,
结束:对齐。右下角,
),
),
儿童:材料(
颜色:颜色。透明,
孩子:InkWell(
飞溅颜色:颜色。白色。不透明度(0.1),
highlightColor:Colors.transparent,
边界半径:边界半径。圆形(8),
onTap:onTap,
儿童:中心(
子:容器(
宽度:48,
身高:48,
对齐:对齐.center,
装饰:盒子装饰(
边界半径:边界半径。圆形(60),
颜色:颜色。琥珀色,
),
子:文本(
标题
样式:TextStyle(
尺寸:24,
颜色:颜色,白色,
fontWeight:fontWeight.bold,
),
),
),
),
),
),
),
),
);
}
}
void main()=>runApp(MyApp());
类MyApp扩展了无状态小部件{
@凌驾
小部件构建(构建上下文){
返回材料PP(
标题:“颤振演示”,
主题:主题数据(
主样本:颜色。蓝色,
),
主页:SimpleExample(),
);
}
}
类MyHomePage扩展StatefulWidget{
MyHomePage({Key,this.title}):超级(Key:Key);
最后的字符串标题;
@凌驾
_MyHomePageState createState()=>\u MyHomePageState();
}
类_MyHomePageState扩展状态{
int _计数器=0;
void _incrementCounter(){
设置状态(){
_计数器++;
});
}
@凌驾
小部件构建(构建上下文){
返回脚手架(
appBar:appBar(
标题:文本(widget.title),
),
正文:中(
子:列(
mainAxisAlignment:mainAxisAlignment.center,
儿童:[
正文(
“您已经按了这么多次按钮:”,
),
正文(
“$”计数器“,
样式:Theme.of(context).textTheme.display1,
),
],
),
),
浮动操作按钮:浮动操作按钮(
按下时:\ u递增计数器,
工具提示:“增量”,
子:图标(Icons.add),
),
);
}
}
请提供更详细的答案,解释为什么您提供的代码有助于OP。
FlipView(
animationController: _curvedAnimation,
front: _buildCard('A', () => _flip(true)),
back: _buildCard('B', () => _flip(false)),
goBackDirection: AxisDirection.right,
goFrontDirection: AxisDirection.right,
)