flutter仿商品列表一（滚动学习）

import 'package:flutter/material.dart';
class ListPages extends StatefulWidget {
  ListPages({Key key}) : super(key: key);
  @override
  _ListPagesState createState() => _ListPagesState();
}
class _ListPagesState extends State {
  ScrollController _leftScrollController = ScrollController(); // 滚动左边监听
  ScrollController _rightScrollController = ScrollController(); // 滚动右边监听
  ScrollController _fatherScrollController = ScrollController(); // 滚动右边监听
  @override
  void initState() {
    _leftScrollController.addListener(() {
      print(_leftScrollController.offset); //打印滚动位置
      if (_leftScrollController.offset == 0.0) { // 拉到顶部
          // _fatherScrollController.jumpTo(0.0);
        _fatherScrollController.animateTo(.0,
                duration: Duration(milliseconds: 200),
                curve: Curves.ease
            );
      }
      if (_leftScrollController.position.pixels == _leftScrollController.position.maxScrollExtent) { // 拉到底部
        print('----left----');
        // _fatherScrollController.jumpTo(_leftScrollController.position.maxScrollExtent);
          _fatherScrollController.animateTo(_leftScrollController.position.maxScrollExtent,
                duration: Duration(milliseconds: 200),
                curve: Curves.ease
            );
        // physics: new NeverScrollableScrollPhysics(), //禁用滑动事件
      }
    });
    _rightScrollController.addListener(() {
      print(_rightScrollController.offset); //打印滚动位置
      if (_rightScrollController.offset == 0.0) { // 拉到顶部
        // _fatherScrollController.jumpTo(0.0);
         _fatherScrollController.animateTo(.0,
                duration: Duration(milliseconds: 200),
                curve: Curves.ease
            );
      }
      if (_rightScrollController.position.pixels == _rightScrollController.position.maxScrollExtent) { // 拉到底部
        print('----right----');
        // _fatherScrollController.jumpTo(_rightScrollController.position.maxScrollExtent);
         _fatherScrollController.animateTo(_leftScrollController.position.maxScrollExtent,
                duration: Duration(milliseconds: 200),
                curve: Curves.ease
            );
      }
    });
    super.initState();
  }
  @override
  void deactivate() {
    _leftScrollController.dispose(); // 为了避免内存泄露，需要调用_controller.dispose
    _rightScrollController.dispose(); // 为了避免内存泄露，需要调用_controller.dispose
    super.deactivate();
  }
  @override
  Widget build(BuildContext context) {
    // print(MediaQuery.of(context));
    final mediaQuerySize = MediaQuery.of(context).size; // 获取手机信息
    final width = mediaQuerySize.width; // 获取宽度
    final height = mediaQuerySize.height; // 获取高度
   return Scaffold(
    //  appBar: AppBar(
    //     title: Text("商品列表"),
    //   ),
      body: Container(
          child: SingleChildScrollView(
            controller: _fatherScrollController,
            child: Column(
              children: [
                // 头部
                Container(
                  height: 150,
                  decoration: BoxDecoration(
                    // color: Colors.red
                  ),
                  child: ConstrainedBox(
                    constraints: BoxConstraints.expand(),
                    child: Image.asset('images/public/background.png', fit: BoxFit.cover),
                  )
                ),
                // 分割线
                Container(
                  height: 10,
                  decoration: BoxDecoration(
                    color: Colors.green
                  ),
                ),
                // 中间
                Container(
                  // height: 400,
                  decoration: BoxDecoration(
                    color: Colors.red
                  ),
                  child: Row(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Expanded(
                        flex: 1,
                        child: Container(
                          height: height - 160,
                          decoration: BoxDecoration(
                            color: Colors.black
                          ),
                          child: ListView(
                            controller: _leftScrollController,
                            shrinkWrap: true,
                            children: [
                              Column(
                                children: [
                                  _leftItem(),
                                  _leftItem(),
                                  _leftItem(),
                                  _leftItem(),
                                  _leftItem(),
                                  _leftItem()  
                                ],
                              )
                            ],
                          )
                        ),
                      ),
                      Expanded(
                        flex: 1,
                        child: Container(
                          height: height - 160,
                          decoration: BoxDecoration(
                            color: Colors.blue
                          ),
                          child: ListView(
                            controller: _rightScrollController,
                            shrinkWrap: true,
                            children: [
                              Column(
                                children: [
                                  _rightItem(),
                                  _rightItem(),
                                  _rightItem(),
                                  _rightItem(),
                                  _rightItem(),
                                  _rightItem()  
                                ],
                              )
                            ],
                          )
                        )
                      )
                    ],
                  )
                ),
                // 底部
                Container(
                  height: 50,
                  decoration: BoxDecoration(
                    color: Colors.red
                  ),
                  child: Row(
                    children: [
                      Text('---底部---')
                    ],
                  ),
                )
              ]
          ),
        )
      )
    );
  }
  _rightItem() {
    return (
      Container(
        height: 100,
        color: Colors.pink,
        margin: EdgeInsets.only(top: 10),
        child: Padding(
        padding: EdgeInsets.all(10),
        child: Text("右边"),
        ),
      )
    );
  }
  _leftItem() {
    return (
      Container(
        height: 100,
        color: Colors.pink,
        margin: EdgeInsets.only(top: 10),
        child: Padding(
        padding: EdgeInsets.all(10),
        child: Text("左边"),
        ),
      )
    );
  }
}


作者：An_s
                    

 
                


                            商品列表
                            列表
                            学习
                            flutter