更新时间：2019年07月17日 11:24:40 转载 作者：早起的年轻人
这篇文章主要为大家详细介绍了flutter PageView实现左右滑动切换视图，具有一定的参考价值，感兴趣的小伙伴们可以参考一下
本文实例为大家分享了flutter PageView左右滑动切换视图的具体代码，供大家参考，具体内容如下
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import 'dart:math';import 'package:cached_network_image/cached_network_image.dart';import 'package:flutter/cupertino.dart';import 'package:flutter/material.dart';import 'package:flutter_x/base/base_appbar_page.dart';class LeftPageViewPage extends StatefulWidget { @override State<StatefulWidget> createState() { return new LeftPageViewPageState(); }}class LeftPageViewPageState extends BaseAppBarPageState<LeftPageViewPage> { @override String buildInitState() { buildBackBar("pageView", backIcon: Icons.arrow_back_ios); return null; } final _controller = new PageController(); static const _kDuration = const Duration(milliseconds: 300); static const _kCurve = Curves.ease; final List<Widget> _pages = <Widget>[ new ConstrainedBox( constraints: const BoxConstraints.expand(), child: new CachedNetworkImage( double.infinity, height: double.infinity, fit: BoxFit.fill, imageUrl: placeholder: (context, url) => new SizedBox( 24.0, height: 24.0, child: new CircularProgressIndicator( strokeWidth: 2.0, ), ), errorWidget: (context, url, error) => new Icon(Icons.error), ), ), new ConstrainedBox( constraints: const BoxConstraints.expand(), child: new CachedNetworkImage( double.infinity, height: double.infinity, fit: BoxFit.fill, imageUrl: placeholder: (context, url) => new SizedBox( 24.0, height: 24.0, child: new CircularProgressIndicator( strokeWidth: 2.0, ), ), errorWidget: (context, url, error) => new Icon(Icons.error), ), ), new ConstrainedBox( constraints: const BoxConstraints.expand(), child: new Stack( //Stack即层叠布局控件，能够将子控件层叠排列 //alignment：此参数决定如何去对齐没有定位（没有使用Positioned）或部分定位的子widget。所谓部分定位，在这里特指没有在某一个轴上定位：left、right为横轴，top、bottom为纵轴，只要包含某个轴上的一个定位属性就算在该轴上有定位。 alignment: AlignmentDirectional.topStart, children: <Widget>[ new CachedNetworkImage( double.infinity, height: double.infinity, fit: BoxFit.fill, placeholder: (context, url) => SizedBox( 24,height: 25,child: CircularProgressIndicator(strokeWidth: 2.0,),), errorWidget: (context, url, error) => new Icon(Icons.error), ), new Align( alignment: Alignment.bottomCenter, child: new Container( margin: EdgeInsets.only(bottom: 80.0), child: FlatButton(onPressed: (){}, child: Text("立即体验")) , ), ), ], )), ]; @override Widget buildWidget(BuildContext context) { // TODO: implement buildWidget return new Stack( children: <Widget>[ //pageViw PageView.builder( physics: new AlwaysScrollableScrollPhysics(), controller: _controller, itemBuilder: (BuildContext context, int index) { return _pages[index]; }, //条目个数 itemCount: _pages.length, ), //圆点指示器 new Positioned( bottom: 0.0, left: 0.0, right: 0.0, child: new Container( color: Colors.white, padding: const EdgeInsets.all(20.0), child: new Center( child: new DotsIndicator( controller: _controller, itemCount: _pages.length, onPageSelected: (int page) { _controller.animateToPage( page, duration: _kDuration, curve: _kCurve, ); }), ), ), ), ], ); }}class DotsIndicator extends AnimatedWidget { DotsIndicator({ this.controller, this.itemCount, this.onPageSelected, this.color: Colors.red, }) : super(listenable: controller); /// The PageController that this DotsIndicator is representing. final PageController controller; /// The number of items managed by the PageController final int itemCount; /// Called when a dot is tapped final ValueChanged<int> onPageSelected; /// The color of the dots. /// /// Defaults to `Colors.white`. final Color color; // The base size of the dots static const double _kDotSize = 8.0; // The increase in the size of the selected dot static const double _kMaxZoom = 2.0; // The distance between the center of each dot static const double _kDotSpacing = 25.0; Widget _buildDot(int index) { double selectedness = Curves.easeOut.transform( max( 0.0, 1.0 - ((controller.page ?? controller.initialPage) - index).abs(), ), ); double zoom = 1.0 + (_kMaxZoom - 1.0) * selectedness; return new Container( _kDotSpacing, child: new Center( child: new Material( color: color, type: MaterialType.circle, child: new Container( _kDotSize * zoom, height: _kDotSize * zoom, child: new InkWell( onTap: () => onPageSelected(index), ), ), ), ), ); } Widget build(BuildContext context) { return new Row( mainAxisAlignment: MainAxisAlignment.center, children: new List<Widget>.generate(itemCount, _buildDot), ); }} |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。