forked from lxm_flutter/FlutterUnit
100 lines
3.2 KiB
Dart
100 lines
3.2 KiB
Dart
import 'package:flutter/cupertino.dart';
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import 'package:flutter/material.dart';
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/// create by 张风捷特烈 on 2020/9/21
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/// contact me by email 1981462002@qq.com
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/// 说明: 302 CupertinoSliverNavigationBar Sliver导航条 iOS11中导航条效果，展开时largeTitle显示,列表上滑后不显示，如果middle为空，largeTitle会以小字号作为middle。
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// {
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// "widgetId": 302,
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// "name": '导航条基本使用',
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// "priority": 1,
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// "subtitle":
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// "【leading】 : 左侧组件 【Widget】\n"
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// "【middle】 : 中间组件 【Widget】\n"
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// "【trailing】 : 尾部组件 【Widget】\n"
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// "【largeTitle】 : 底部折展组件 【Widget】\n"
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// "【border】 : 边线 【Border】\n"
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// "【backgroundColor】 : 背景色 【Color】\n"
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// "【padding】 : 内边距 【EdgeInsetsDirectional】",
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// }
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class CupertinoSliverNavigationBarDemo extends StatelessWidget {
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final data = <Color>[
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Colors.orange[50],
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Colors.orange[100],
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Colors.orange[200],
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Colors.orange[300],
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Colors.orange[400],
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Colors.orange[500],
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Colors.orange[600],
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Colors.orange[700],
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Colors.orange[800],
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Colors.orange[900],
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];
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@override
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Widget build(BuildContext context) {
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return Container(
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height: 300,
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child: CustomScrollView(
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slivers: <Widget>[
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CupertinoSliverNavigationBar(
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trailing: Icon(
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CupertinoIcons.share,
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size: 25,
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),
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leading: _buildLeading(),
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backgroundColor: Colors.white,
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// middle: Text('张风捷特烈'),
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largeTitle: Row(
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mainAxisSize: MainAxisSize.min,
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children: [
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Icon(
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Icons.ac_unit,
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size: 20,
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),
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Padding(
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padding: const EdgeInsets.symmetric(horizontal: 8),
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child: Text('张风捷特烈'),
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),
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Icon(Icons.ac_unit, size: 20),
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],
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),
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),
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_buildSliverList()
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],
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),
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);
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}
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Widget _buildSliverList() => SliverPrototypeExtentList(
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prototypeItem: Container(
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height: 40,
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),
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delegate: SliverChildBuilderDelegate(
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(_, int index) => Container(
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alignment: Alignment.center,
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width: 100,
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height: 60,
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color: data[index],
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child: Text(
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colorString(data[index]),
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style: TextStyle(color: Colors.white, shadows: [
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Shadow(
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color: Colors.black,
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offset: Offset(.5, .5),
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blurRadius: 2)
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]),
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),
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),
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childCount: data.length),
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);
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Widget _buildLeading() => Container(
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margin: EdgeInsets.all(10),
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child: Image.asset('assets/images/icon_head.webp'));
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String colorString(Color color) =>
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"#${color.value.toRadixString(16).padLeft(8, '0').toUpperCase()}";
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}
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