如何在 Flutter 的 PageView 全屏内制作容器?
How to make a Container inside a PageView full screen in Flutter?
我有一个简单的水平列表,例如图像轮播,我可以使用 AnimatedBuilder
.
来浏览它
我想让每个单独的容器在我点击它时都具有动画效果并展开全屏。
我将容器包裹在 GestureDetector
中,我可以很好地点击它们,现在我需要将容器缩放到全屏。
我尝试使用 Positioned
来预置它,但它并没有真正起作用,因为它重新定位了 "carousel".
中的所有容器
基本上,我需要将螺纹容器 "pop" 出来,或多或少像位置 a html DIV 绝对。
有什么想法吗?
import 'package:flutter/material.dart';
void main() => runApp(new MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return new MaterialApp(
title: 'Flutter Demo',
theme: new ThemeData(
primarySwatch: Colors.blue,
),
home: new MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => new _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int currentPage = 0;
PageController _controller;
@override
void initState() {
super.initState();
_controller = new PageController(
initialPage: currentPage,
keepPage: true,
viewportFraction: 0.8,
);
}
@override
dispose() {
_controller.dispose();
super.dispose();
}
expandMe() {
print('I want to be fill screen');
}
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
title: new Text(widget.title),
),
body: new SafeArea(
child: new Column(
children: [
new Expanded(
child: new PageView.builder(
itemCount: 2,
onPageChanged: (value) {
setState(() {
currentPage = value;
});
},
controller: _controller,
itemBuilder: (context, index) => builder(index),
),
)
],
),
),
);
}
builder(int index) {
return new AnimatedBuilder(
animation: _controller,
builder: (BuildContext context, Widget child) {
return child;
},
child: Padding(
padding: const EdgeInsets.all(8.0),
child: new GestureDetector(
onTap: expandMe,
// on tap, make this one container full screen
child: new Container(
decoration: new BoxDecoration(
borderRadius: new BorderRadius.circular(15.0),
color: Colors.white,
boxShadow: <BoxShadow>[
new BoxShadow(
color: Colors.black12,
blurRadius: 10.0,
offset: new Offset(0.0, 10.0),
),
],
),
child: new Text('page ' + index.toString()),
),
),
),
);
}
}
创建一个新的全屏页面。将 英雄动画 添加到容器中。它看起来就像您想要的那样。
我有一个简单的水平列表,例如图像轮播,我可以使用 AnimatedBuilder
.
我想让每个单独的容器在我点击它时都具有动画效果并展开全屏。
我将容器包裹在 GestureDetector
中,我可以很好地点击它们,现在我需要将容器缩放到全屏。
我尝试使用 Positioned
来预置它,但它并没有真正起作用,因为它重新定位了 "carousel".
基本上,我需要将螺纹容器 "pop" 出来,或多或少像位置 a html DIV 绝对。
有什么想法吗?
import 'package:flutter/material.dart';
void main() => runApp(new MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return new MaterialApp(
title: 'Flutter Demo',
theme: new ThemeData(
primarySwatch: Colors.blue,
),
home: new MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => new _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int currentPage = 0;
PageController _controller;
@override
void initState() {
super.initState();
_controller = new PageController(
initialPage: currentPage,
keepPage: true,
viewportFraction: 0.8,
);
}
@override
dispose() {
_controller.dispose();
super.dispose();
}
expandMe() {
print('I want to be fill screen');
}
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
title: new Text(widget.title),
),
body: new SafeArea(
child: new Column(
children: [
new Expanded(
child: new PageView.builder(
itemCount: 2,
onPageChanged: (value) {
setState(() {
currentPage = value;
});
},
controller: _controller,
itemBuilder: (context, index) => builder(index),
),
)
],
),
),
);
}
builder(int index) {
return new AnimatedBuilder(
animation: _controller,
builder: (BuildContext context, Widget child) {
return child;
},
child: Padding(
padding: const EdgeInsets.all(8.0),
child: new GestureDetector(
onTap: expandMe,
// on tap, make this one container full screen
child: new Container(
decoration: new BoxDecoration(
borderRadius: new BorderRadius.circular(15.0),
color: Colors.white,
boxShadow: <BoxShadow>[
new BoxShadow(
color: Colors.black12,
blurRadius: 10.0,
offset: new Offset(0.0, 10.0),
),
],
),
child: new Text('page ' + index.toString()),
),
),
),
);
}
}
创建一个新的全屏页面。将 英雄动画 添加到容器中。它看起来就像您想要的那样。