zhiying_base_widget/lib/pages/home_page/home_page.dart

import 'dart:convert' as convert;

import 'package:cached_network_image/cached_network_image.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:zhiying_comm/models/base/base_tab_model.dart';
import 'package:zhiying_comm/util/image_util.dart';
import 'package:zhiying_comm/zhiying_comm.dart';

class HomePage extends StatefulWidget {
  HomePage({Key key}) : super(key: key);

  @override
  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  int _currentIndex = 0;
  List<Map<String, dynamic>> _data = List();

  @override
  void initState() {
    String data = BaseSettingModel.setting.tab['data'];
    try {
      List list = convert.jsonDecode(data);
      _data = list.map((item) {
        return Map<String, dynamic>.from(item);
      }).toList();
      Logger.debug(_data);
    } catch (error) {
      Logger.error(error);
    }

    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    print('home_page build');
    List<Map<String, dynamic>> tabs = _data;
    if (tabs == null || tabs.length == 0) {
      return Scaffold();
    }

    List<Widget> contentWidgets = tabs.map((item) {
      BaseTabModel model = BaseTabModel.fromJson(item);
      return PageFactory.create(model.skipIdentifier, item);
    }).toList();
    if (_currentIndex >= contentWidgets.length) {
      _currentIndex = 0;
    }

    return Scaffold(
      body: IndexedStack(
        index: _currentIndex,
        children: contentWidgets,
      ),
      //底部导航栏
      bottomNavigationBar: createBottomNavigationBar(tabs),
    );
  }

  Widget createBottomNavigationBar(List<Map<String, dynamic>> tabs) {
    List<BottomNavigationBarItem> items = List<BottomNavigationBarItem>();

    for (int i = 0; i < tabs.length; i++) {
      BaseTabModel model = BaseTabModel.fromJson(tabs[i]);
      String icon = ImageUtil.getUrl(model.icon);
      String selectedIcon = ImageUtil.getUrl(model.chooseIcon ?? model.icon);
      String textColor = model.fontColor;
      String chooseColor = model.chooseColor ?? textColor;
      items.add(BottomNavigationBarItem(
          icon: Container(
            width: 24,
            height: 24,
            margin: EdgeInsets.only(bottom: 4),
            child: CachedNetworkImage(
              imageUrl: _currentIndex == i ? selectedIcon : icon,
              fit: BoxFit.fitWidth,
            ),
          ),
          title: Text(
            model.name,
            style: TextStyle(
                fontSize: 11,
                color: HexColor.fromHex(
                    _currentIndex == i ? chooseColor : textColor)),
          )));
    }

    if (items.length < 2) {
      return Container();
    }
    String bgColor = '#ffffff';
    if (tabs.first != null) {
      BaseTabModel model = BaseTabModel.fromJson(tabs.first);
      bgColor = model.bgColor ?? bgColor;
    }
    return BottomNavigationBar(
        backgroundColor: HexColor.fromHex(bgColor),
        type: BottomNavigationBarType.fixed,
        selectedFontSize: 11,
        unselectedFontSize: 11,
        currentIndex: _currentIndex,
        elevation: 0,
        onTap: ((index) {
          setState(() {
            _currentIndex = index;
          });
        }),
        //底部导航栏
        items: items);
  }
}