第一层tabView
import 'package:jade/configs/PathConfig.dart';
import 'package:jade/customWidget/MyCustomIndicator.dart';
import'package:jade/homePage/promotion/promotionPost/MyPromotionListMainDesc.dart';
import 'package:jade/homePage/promotion/promotionPost/MyPromotionListSecond.dart';
import 'package:atui/jade/utils/JadeColors.dart';
import 'package:atui/util/navigator_util.dart';
import 'package:atui/widget/custom_appbar.dart';
import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
class MyPromotionListMain extends StatefulWidget{
@override
State
// TODO: implement createState
return _MyPromotionListMain();
}
}
class _MyPromotionListMain extends State
List
TabController _tabController;
@override
void initState() {
// TODO: implement initState
super.initState();
_tabController = TabController(
// initialIndex: widget.initialIndex??0,
length: _tabs.length,vsync: this);
}
@override
void dispose() {
// TODO: implement dispose
_tabController.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
// TODO: implement build
return Scaffold(
backgroundColor: Colors.white,
appBar: CustomAppBar(
backgroundColor: Colors.white,
elevation: 0,
leading: GestureDetector(
onTap: () {
Navigator.pop(context);
},
child: Icon(Icons.arrow_back_ios),
),
iconTheme: IconThemeData(color: Color(0xff999999)),
title: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Container(),
Container(
margin: EdgeInsets.only(right: 34.w),
child: Text(
'推享赚',
style: TextStyle(color: Colors.black),
),
),
GestureDetector(
child: Container(
color: Colors.transparent,
padding: EdgeInsets.all(4),
child: Image.asset(PathConfig.iconQuestion,height: 40.w),
),
onTap: () {
NavigatorUtil.push(MyPromotionListMainDesc());
},
)
],
),
centerTitle: true,
),
body: _body()
);
}
_body(){
return Column(
children: [
_tabBarView(),
Container(
height: 2.w,
width: double.infinity,
color: JadeColors.lightGrey,
margin: EdgeInsets.symmetric(vertical: 20.w),
),
Expanded(child: _tabView())
],
);
}
_tabBarView(){
return TabBar(
isScrollable: false,
labelPadding: EdgeInsets.symmetric(horizontal: 0),
indicator: MyCustomIndicator(),
labelColor: Color(0xff333333),
labelStyle: TextStyle(
fontSize: 30.sp,
fontWeight: FontWeight.w600,
),
unselectedLabelColor: JadeColors.grey,
unselectedLabelStyle: TextStyle(
fontSize: 30.sp,
fontWeight: FontWeight.w300
),
indicatorSize: TabBarIndicatorSize.label,
controller: _tabController,
tabs: _tabs
.map((value) => Container(padding: EdgeInsets.symmetric(horizontal: 20.w),child: Text(value))).toList(),
onTap: (index) {},
);
}
_tabView(){
return TabBarView(
//physics: const NeverScrollableScrollPhysics(),
controller: _tabController,
children: [
MyPromotionListSecond(type: 0),
MyPromotionListSecond(type: 1),
MyPromotionListSecond(type: 2)
]
);
}
}
第二层tabView
import 'package:-jade/homePage/promotion/promotionPost/MyPromotionList.dart';
import 'package:jade/utils/JadeColors.dart';
import 'package:util/tab/customize_dicator.dart';
import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
/*
* 状态这一级的tabBar页面
* */
class TabTypeMode {
int status;
String title;
TabTypeMode({
this.status,
this.title,
});
}
class MyPromotionListSecond extends StatefulWidget{
final int type; //0我发布的 1我推享的 2我的阿推码
const MyPromotionListSecond({@required this.type});
@override
State
// TODO: implement createState
return _MyPromotionListSecond();
}
}
class _MyPromotionListSecond extends State
List
TabController _tabController;
@override
void initState() {
// TODO: implement initState
if(widget.type == 2){
_tabs = [
TabTypeMode(status: 0,title: '全部'),
TabTypeMode(status: 1,title: '待使用'),
TabTypeMode(status: 2,title: '已使用'),
TabTypeMode(status: 3,title: '已失效')
];
}else{
_tabs = [
TabTypeMode(status: 0,title: '全部'),
TabTypeMode(status: 1,title: '进行中'),
TabTypeMode(status: 2,title: '已结束')
];
}
super.initState();
_tabController = TabController(
// initialIndex: widget.initialIndex??0,
length: _tabs.length,vsync: this);
}
@override
void dispose() {
// TODO: implement dispose
_tabController.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
// TODO: implement build
return _body();
}
_body(){
return Column(
children: [
Container(
margin: EdgeInsets.only(bottom: 20.w),
alignment: Alignment.centerLeft,
child: _tabBarView(),
),
Expanded(child: _tabView())
],
);
}
_tabBarView(){
return TabBar(
isScrollable: true,
labelPadding: EdgeInsets.symmetric(horizontal: 0),
indicator: MyUnderlineTabIndicator(
borderSide:
BorderSide(width: 2, color: JadeColors.yellow),
insets: EdgeInsets.only(bottom: 5)),
labelColor: Color(0xff333333),
labelStyle: TextStyle(
fontSize: 30.sp,
fontWeight: FontWeight.w600,
),
unselectedLabelColor: JadeColors.grey,
unselectedLabelStyle: TextStyle(
fontSize: 30.sp,
fontWeight: FontWeight.w300
),
indicatorWeight: 20.w,
indicatorSize: TabBarIndicatorSize.label,
controller: _tabController,
tabs: _tabs
.map((value) => Container(padding: EdgeInsets.symmetric(horizontal: 20.w),child: Text(value.title))).toList(),
onTap: (index) {},
);
}
_tabView(){
return TabBarView(
//physics: const NeverScrollableScrollPhysics(),
controller: _tabController,
children: _tabs.map((value) {
return MyPromotionList(widget.type,value.status);
}).toList()
);
}
}
指示器：
import 'package:flutter/material.dart';
class MyCustomIndicator extends Decoration {
final double indWidth;
final double indHeight;
final double radius;
MyCustomIndicator({this.indWidth = 70.0, this.indHeight = 12.0, this.radius = 5});
@override
BoxPainter createBoxPainter([VoidCallback onChanged]) {
return _CustomBoxPainter(this, onChanged, indWidth, indHeight, radius);
}
}
class _CustomBoxPainter extends BoxPainter {
final MyCustomIndicator decoration;
final double indWidth;
final double indHeight;
final double radius;
_CustomBoxPainter(this.decoration, VoidCallback onChanged, this.indWidth, this.indHeight, this.radius)
: super(onChanged);
@override
void paint(Canvas canvas, Offset offset, ImageConfiguration configuration) {
final size = configuration.size;
final newOffset = Offset(offset.dx + (size.width - indWidth) / 2, size.height - indHeight);
final Rect rect = newOffset & Size(indWidth, indHeight);
final Paint paint = Paint();
paint.color = Colors.yellow;
paint.style = PaintingStyle.fill;
canvas.drawRRect(
RRect.fromRectAndRadius(rect, Radius.circular(radius)), // 圆角半径
paint,
);
}
}
// Copyright 2018 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file.
import ‘package:flutter/material.dart’; import ‘package:flutter/widgets.dart’;
/// Used with [TabBar.indicator] to draw a horizontal line below the /// selected tab. /// /// The selected tab underline is inset from the tab’s boundary by [insets]. /// The [borderSide] defines the line’s color and weight. /// /// The [TabBar.indicatorSize] property can be used to define the indicator’s /// bounds in terms of its (centered) widget with [TabIndicatorSize.label], /// or the entire tab with [TabIndicatorSize.tab]. class MyUnderlineTabIndicator extends Decoration { /// Create an underline style selected tab indicator. /// /// The [borderSide] and [insets] arguments must not be null. const MyUnderlineTabIndicator({ this.borderSide = const BorderSide(width: 2.0, color: Colors.white), this.insets = EdgeInsets.zero, }) : assert(borderSide != null), assert(insets != null);
/// The color and weight of the horizontal line drawn below the selected tab. final BorderSide borderSide;
/// Locates the selected tab’s underline relative to the tab’s boundary. /// /// The [TabBar.indicatorSize] property can be used to define the /// tab indicator’s bounds in terms of its (centered) tab widget with /// [TabIndicatorSize.label], or the entire tab with [TabIndicatorSize.tab]. final EdgeInsetsGeometry insets;
@override Decoration lerpFrom(Decoration a, double t) { if (a is UnderlineTabIndicator) { return UnderlineTabIndicator( borderSide: BorderSide.lerp(a.borderSide, borderSide, t), insets: EdgeInsetsGeometry.lerp(a.insets, insets, t), ); } return super.lerpFrom(a, t); }
@override Decoration lerpTo(Decoration b, double t) { if (b is MyUnderlineTabIndicator) { return MyUnderlineTabIndicator( borderSide: BorderSide.lerp(borderSide, b.borderSide, t), insets: EdgeInsetsGeometry.lerp(insets, b.insets, t), ); } return super.lerpTo(b, t); }
@override _MyUnderlinePainter createBoxPainter([ VoidCallback onChanged ]) { return _MyUnderlinePainter(this, onChanged); } }
class _MyUnderlinePainter extends BoxPainter { _MyUnderlinePainter(this.decoration, VoidCallback onChanged) : assert(decoration != null), super(onChanged);
final MyUnderlineTabIndicator decoration;
BorderSide get borderSide => decoration.borderSide; EdgeInsetsGeometry get insets => decoration.insets;
Rect _indicatorRectFor(Rect rect, TextDirection textDirection) { assert(rect != null); assert(textDirection != null); final Rect indicator = insets.resolve(textDirection).deflateRect(rect);
//希望的宽度
double wantWidth = 14;
//取中间坐标
double cw = (indicator.left + indicator.right) / 2;
return Rect.fromLTWH(cw - wantWidth / 2,
indicator.bottom - borderSide.width, wantWidth, borderSide.width);
}
@override void paint(Canvas canvas, Offset offset, ImageConfiguration configuration) { assert(configuration != null); assert(configuration.size != null); final Rect rect = offset & configuration.size; final TextDirection textDirection = configuration.textDirection; final Rect indicator = _indicatorRectFor(rect, textDirection).deflate(borderSide.width / 2.0); // final Paint paint = borderSide.toPaint()…strokeCap = StrokeCap.square; // 改为圆角 final Paint paint = borderSide.toPaint()…strokeCap = StrokeCap.round; canvas.drawLine(indicator.bottomLeft, indicator.bottomRight, paint); } }
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