Flutter 颤振动画-使用Matrix4显示时向上移动
颤振中是否有任何内置动画,其效果与下页相同? 示例:长滚动页面,当我们向下滚动时,屏幕上会出现新内容,并稍微向上移动Flutter 颤振动画-使用Matrix4显示时向上移动,flutter,flutter-animation,Flutter,Flutter Animation,颤振中是否有任何内置动画,其效果与下页相同? 示例:长滚动页面,当我们向下滚动时,屏幕上会出现新内容,并稍微向上移动 我认为,动画列表可以对此有所帮助,如果需要,您也可以将其与StreamBuilder一起使用。 或者,您可以使用动画容器,每个页面如下所示; 编辑:代码示例 import 'dart:async'; import 'package:flutter/cupertino.dart'; import 'package:flutter/material.dart'; void ma
我认为,动画列表可以对此有所帮助,如果需要,您也可以将其与StreamBuilder一起使用。 或者,您可以使用动画容器,每个页面如下所示; 编辑:代码示例
import 'dart:async';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
@override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: ListView(
children: [Container(
color: Colors.blue,
height: 1000,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
SlideFadeTransition(
delayStart: Duration(milliseconds: 800),
offset: 2,
child: new Text('Test Text 1')),
SlideFadeTransition(
delayStart: Duration(milliseconds: 1200),
offset: 4,
child: new Text('Test Text 2'))
],
),
),
Container(
color: Colors.red,
height: 1000,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
SlideFadeTransition(
delayStart: Duration(milliseconds: 1200),
offset: 2,
child: new Text('Test Text 1')),
SlideFadeTransition(
delayStart: Duration(milliseconds: 2400),
offset: 4,
child: new Text('Test Text 2'))
],
),
),
Container(
color: Colors.orange,
height: 1000,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
SlideFadeTransition(
delayStart: Duration(milliseconds: 1200),
offset: 2,
child: new Text('Test Text 1')),
SlideFadeTransition(
delayStart: Duration(milliseconds: 2400),
offset: 4,
child: new Text('Test Text 2'))
],
),
),
]
)
)
);
}
}
enum Direction { vertical, horizontal }
class SlideFadeTransition extends StatefulWidget {
///The child on which to apply the given [SlideFadeTransition]
final Widget child;
///The offset by which to slide and [child] into view from [Direction].
///Defaults to 0.2
final double offset;
///The curve used to animate the [child] into view.
///Defaults to [Curves.easeIn]
final Curve curve;
///The direction from which to animate the [child] into view. [Direction.horizontal]
///will make the child slide on x-axis by [offset] and [Direction.vertical] on y-axis.
///Defaults to [Direction.vertical]
final Direction direction;
///The delay with which to animate the [child]. Takes in a [Duration] and
/// defaults to 0.0 seconds
final Duration delayStart;
///The total duration in which the animation completes. Defaults to 800 milliseconds
final Duration animationDuration;
SlideFadeTransition({
@required this.child,
this.offset = 0.2,
this.curve = Curves.easeIn,
this.direction = Direction.vertical,
this.delayStart = const Duration(seconds: 0),
this.animationDuration = const Duration(milliseconds: 800),
});
@override
_SlideFadeTransitionState createState() => _SlideFadeTransitionState();
}
class _SlideFadeTransitionState extends State<SlideFadeTransition>
with SingleTickerProviderStateMixin {
Animation<Offset> _animationSlide;
AnimationController _animationController;
Animation<double> _animationFade;
@override
void initState() {
super.initState();
_animationController = AnimationController(
vsync: this,
duration: widget.animationDuration,
);
//configure the animation controller as per the direction
if (widget.direction == Direction.vertical) {
_animationSlide =
Tween<Offset>(begin: Offset(0, widget.offset), end: Offset(0, 0))
.animate(CurvedAnimation(
curve: widget.curve,
parent: _animationController,
));
} else {
_animationSlide =
Tween<Offset>(begin: Offset(widget.offset, 0), end: Offset(0, 0))
.animate(CurvedAnimation(
curve: widget.curve,
parent: _animationController,
));
}
_animationFade =
Tween<double>(begin: -1.0, end: 1.0).animate(CurvedAnimation(
curve: widget.curve,
parent: _animationController,
));
Timer(widget.delayStart, () {
_animationController.forward();
});
}
@override
Widget build(BuildContext context) {
return FadeTransition(
opacity: _animationFade,
child: SlideTransition(
position: _animationSlide,
child: widget.child,
),
);}}
导入'dart:async';
进口“包装:颤振/cupertino.dart”;
进口“包装:颤振/材料.省道”;
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:MyHomePage(标题:“颤振演示主页”),
);
}
}
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{
@凌驾
小部件构建(构建上下文){
返回脚手架(
正文:中(
子:ListView(
儿童:[集装箱(
颜色:颜色,蓝色,
身高:1000,
子:列(
mainAxisAlignment:mainAxisAlignment.center,
crossAxisAlignment:crossAxisAlignment.center,
儿童:[
幻灯片格式转换(
延迟启动:持续时间(毫秒:800),
抵销:2,
子项:新文本(“测试文本1”),
幻灯片格式转换(
延迟启动:持续时间(毫秒:1200),
抵销:4,
子项:新文本(“测试文本2”)
],
),
),
容器(
颜色:颜色,红色,
身高:1000,
子:列(
mainAxisAlignment:mainAxisAlignment.center,
crossAxisAlignment:crossAxisAlignment.center,
儿童:[
幻灯片格式转换(
延迟启动:持续时间(毫秒:1200),
抵销:2,
子项:新文本(“测试文本1”),
幻灯片格式转换(
延迟启动:持续时间(毫秒:2400),
抵销:4,
子项:新文本(“测试文本2”)
],
),
),
容器(
颜色:颜色。橙色,
身高:1000,
子:列(
mainAxisAlignment:mainAxisAlignment.center,
crossAxisAlignment:crossAxisAlignment.center,
儿童:[
幻灯片格式转换(
延迟启动:持续时间(毫秒:1200),
抵销:2,
子项:新文本(“测试文本1”),
幻灯片格式转换(
延迟启动:持续时间(毫秒:2400),
抵销:4,
子项:新文本(“测试文本2”)
],
),
),
]
)
)
);
}
}
枚举方向{垂直,水平}
类SlideFadeTransition扩展StatefulWidget{
///要对其应用给定[SlideFadeTransition]的子项
最后一个孩子;
///从[方向]滑动和[子]到视图的偏移量。
///默认值为0.2
最终双偏移量;
///用于在视图中设置[子对象]动画的曲线。
///默认为[Curves.easeIn]
最终曲线;
///将[子对象]设置为视图动画的方向。[方向.水平]
///将使子对象在x轴上滑动[offset],在y轴上滑动[Direction.vertical]。
///默认为[方向.垂直]
最终方向;
///设置[child]动画的延迟时间为[Duration],并且
///默认值为0.0秒
最终持续时间延迟开始;
///动画完成的总持续时间。默认为800毫秒
最终持续时间动画持续时间;
幻灯片格式转换({
@需要这个孩子,
该偏移量=0.2,
this.curve=Curves.easeIn,
this.direction=direction.vertical,
this.delayStart=常数持续时间(秒:0),
this.animationDuration=常量持续时间(毫秒:800),
});
@凌驾
_SlideFadeTransitionState createState()=>\u SlideFadeTransitionState();
}
类SlideFadeTransitionState扩展了状态
使用SingleTickerProviderStateMixin{
动画_animationSlide;
AnimationController _AnimationController;
动画-动画淡入淡出;
@凌驾
void initState(){
super.initState();
_animationController=animationController(
vsync:这个,,
持续时间:widget.animationDuration,
);
//根据方向配置动画控制器
if(widget.direction==direction.vertical){
_动画幻灯片=
Tween(开始:偏移量(0,widget.Offset),结束:偏移量(0,0))
.动画(曲线动画)(
曲线:widget.curve,
父项:_animationController,
));
}否则{
_动画幻灯片=
Tween(开始:偏移量(widget.Offset,0),结束:偏移量(0,0))
.动画(曲线动画)(
曲线:widget.curve,
父项:_animationController,
));
}
_动画淡入淡出=
吐温(开始:-1.0,结束:1.0)。动画(曲线动画)(
曲线:widget.curve,
父项:_animationController,
));
计时器(widget.delayStart,(){
_animationController.forward();
});
}
@凌驾
小部件构建(构建上下文){
返回衰减转换(
不透明度:_animationFade,
子:幻灯片转换(
位置:_animationSlide,
child:widget.child,
),
);}}