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我正在 Gesture button 中创建一个 PopUp 菜单，但单击该按钮时菜单没有显示。单击按钮时什么也没有发生。我应该怎么做才能使其在单击按钮时可见？ 我也使用了 Focused Menu button 但它也发生了同样的情况。我无法弄清楚问题所在。
我正在制作这样的屏幕：
我想在点击按钮时显示这些菜单：
我的屏幕代码是这样的：
import 'package:epicare/Navigbar.dart';
import 'package:Flutter/material.dart';
import 'package:Fluttertoast/Fluttertoast.dart';
import 'package:focused_menu/focused_menu.dart';
import 'package:focused_menu/modals.dart';
import 'AddMedicinescreen.dart';
class MedicinesRecord extends StatefulWidget {
@overrIDe
_MedicinesRecordState createState() => _MedicinesRecordState();
}
class _MedicinesRecordState extends State<MedicinesRecord>
with TickerProvIDerStateMixin {
TabController _tabController;
var _selectedindex = 0;
@overrIDe
voID initState() {
super.initState();
_tabController = TabController(length: 2,vsync: this)
..addListener(() {
setState(() {
_selectedindex = _tabController.index;
});
});
}
@overrIDe
voID dispose() {
super.dispose();
_tabController.dispose();
}
@overrIDe
Widget build(BuildContext context) {
return Scaffold(
backgroundcolor: colors.white,appbar: Appbar(
backgroundcolor: const color(0xffE5E0A1),elevation: 0,centerTitle: true,Title: Text(
"Medicine",style: TextStyle(
FontSize: 15.0,color: colors.black,FontFamily: 'Montserrat',FontWeight: FontWeight.normal,),leading: Iconbutton(
icon: Icon(
Icons.arrow_back,onpressed: () {
Navigator.push(
context,MaterialPageRoute(
builder: (context) {
return Homepage();
},);
},body: Column(
children: [
// give the tab bar a height [can change height to preferred height]
Container(
margin: EdgeInsets.only(top: 32,right: 45,left: 45),height: 45,decoration: Boxdecoration(
color: const color(0xffE5E0A1),borderRadius: borderRadius.circular(
17.0,border: border.all(wIDth: 1.0,color: const color(0xff2f363d)),child: Tabbar(
controller: _tabController,// give the indicator a decoration (color and border radius)
indicator: Boxdecoration(
borderRadius: borderRadius.circular(
17.0,labelcolor: const color(0xffd4d411),unselectedLabelcolor: colors.black,tabs: [
// first tab [you can add an icon using the icon property]
Tab(
child: Text(
'Medicines',style: TextStyle(
FontFamily: 'Montserrat',FontSize: 16,//color: const color(0xffd4d411),letterSpacing: 0.48,textAlign: TextAlign.left,// second tab [you can add an icon using the icon property]
Tab(
child: Text(
'History',],// tab bar vIEw her
Expanded(
child: TabbarVIEw(
controller: _tabController,children: [
// Container(
//padding: EdgeInsets.symmetric(vertical: 25,horizontal: 32),//height: 50,//child:
Medicine(),//),// second tab bar vIEw Widget
MedHistory(),floatingActionbutton: _selectedindex > 0
? Container()
: floatingActionbutton(
child: Icon(
Icons.add,size: 40,backgroundcolor: const color(0xffd4d411),onpressed: () {
Navigator.push(
context,MaterialPageRoute(
builder: (context) {
return AddMedicine();
},);
},);
}
Widget Medicine() {
Size size = Mediaquery.of(context).size;
return ListVIEw(
children: [
Container(
margin: EdgeInsets.only(top: 25,left: 32,right: 32),wIDth: size.wIDth * 0.80,height: 54,padding: EdgeInsets.symmetric(vertical: 11,horizontal: 20),decoration: Boxdecoration(
borderRadius: borderRadius.circular(9.0),color: colors.white,BoxShadow: [
BoxShadow(
color: const color(0x29000000),offset: Offset(0,3),blurRadius: 6,child: Stack(
children: [
Column(
crossAxisAlignment: CrossAxisAlignment.start,children: [
Text(
'Panadol',FontSize: 12,FontWeight: FontWeight.w500,color: const color(0xff232425),Text(
'Thrice a day',FontSize: 10,color: const color(0x80232425),Container(
wIDth: size.wIDth,child: Column(
crossAxisAlignment: CrossAxisAlignment.end,children: [
Text(
'50 mg',style: TextStyle(
FontFamily: 'Montserrat',FontWeight: FontWeight.w600,color: const color(0x80515559),GestureDetector(
onTap: () {
myPopMenu();
// FocusedMenuHolder(
// menuBoxdecoration: Boxdecoration(
// color: const color(0xFFD9D9D9),// ),// animateMenuItems: false,// duration: Duration(milliseconds: 500),// blurBackgroundcolor: colors.white,// blurSize: 2,// menuWIDth: size.wIDth * 0.5,// onpressed: () {},// menuItems: <FocusedMenuItem>[
// FocusedMenuItem(
// Title: Text(
// "Edit",// style: TextStyle(
// FontFamily: 'Montserrat',// FontWeight: FontWeight.w600,// FontSize: 14,// color: const color(0xff000000),// ),// textAlign: TextAlign.center,// ),// onpressed: () {}),// FocusedMenuItem(
// Title: Text(
// "Delete",// onpressed: () {})
// ],// );
},child: Icon(
Icons.more_horiz,size: 20,)
],);
}
Widget MedHistory() {
Size size = Mediaquery.of(context).size;
return ListVIEw(
children: [
Container(
margin: EdgeInsets.only(top: 25,height: 50,Text(
'From: 1 Jan,2021',Text(
'Ongoing',Container(
margin: EdgeInsets.only(top: 25,children: [
Text(
'Calpol',Text(
'As needed',children: [
Text(
'250 mg',Text(
'Ended: 20 Jan,);
}
Widget myPopMenu() {
return PopupMenubutton(
color: colors.white,onSelected: (value) {
Fluttertoast.showToast(
msg: "You have selected " + value.toString(),toastLength: Toast.LENGTH_SHORT,gravity: ToastGravity.BottOM,timeInSecForIosWeb: 1,backgroundcolor: colors.black,textcolor: colors.white,FontSize: 16.0);
},itemBuilder: (context) => [
PopupMenuItem(
value: 1,child: Row(
children: <Widget>[
padding(
padding: const EdgeInsets.fromLTRB(2,2,8,2),child: Icon(Icons.print),Text('Print')
],)),PopupMenuItem(
value: 2,child: Row(
children: <Widget>[
Text(
"Edit",FontSize: 14,color: const color(0xff000000),textAlign: TextAlign.center,PopupMenuItem(
value: 3,child: Row(
children: <Widget>[
Text(
"Delete",style: TextStyle(
FontFamily: 'Montserrat',]);
}
}
PS：我是 Flutter 的新手。请帮帮我
暂无找到可以解决该程序问题的有效方法，小编努力寻找整理中！
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