Flutter 无数据弹出/推送到当前屏幕
我试图在没有返回数据的情况下弹出。 我有一个屏幕,其中有4个底部导航器,每个按钮有4个布局Flutter 无数据弹出/推送到当前屏幕,flutter,dart,flutter-layout,Flutter,Dart,Flutter Layout,我试图在没有返回数据的情况下弹出。 我有一个屏幕,其中有4个底部导航器,每个按钮有4个布局 LayoutType.table: (_) => Page1( layoutGroup: _layoutGroup, onLayoutToggle: _onLayoutGroupToggle), LayoutType.favorite: (_) => Page2( layoutGroup: _layoutGroup, onLayo
LayoutType.table: (_) => Page1(
layoutGroup: _layoutGroup, onLayoutToggle: _onLayoutGroupToggle),
LayoutType.favorite: (_) => Page2(
layoutGroup: _layoutGroup, onLayoutToggle: _onLayoutGroupToggle),
LayoutType.menu: (_) => Page3(
layoutGroup: _layoutGroup, onLayoutToggle: _onLayoutGroupToggle),
LayoutType.custom: (_) => Page4(
layoutGroup: _layoutGroup, onLayoutToggle: _onLayoutGroupToggle),
}[_layoutSelection](context);
在第3页,我有一个带有文本字段和flatbutton的showdialog内容add,在我按下add后,我需要回到第3页,我尝试使用pop,但如果我再次按下add按钮,它将返回我添加的最后一个数据
有没有办法弹出返回数据?
我尝试使用Push/PushNamed,但它总是返回到第一个屏幕第1页
class MenuPage extends StatefulWidget implements HasLayoutGroup {
MenuPage({Key key, this.layoutGroup, this.onLayoutToggle}) : super(key: key);
final LayoutGroup layoutGroup;
final VoidCallback onLayoutToggle;
@override
_MenuPageState createState() => _MenuPageState();
}
class _MenuPageState extends State<MenuPage> {
double _width;
double _height;
String menuName;
String menuPrice;
String menuCategory;
String selectedCategory;
final formatPrice = NumberFormat.simpleCurrency();
var menu;
crudMedthods crudObj = new crudMedthods();
List _categorymenu = ["Food", "Beverage", "Liquor", "Electricity", "Others"];
final _textEditingMenu = TextEditingController();
final _textEditingPrice = TextEditingController();
List<DropdownMenuItem<String>> _dropDownMenuItems;
String _currentCategory;
List<DropdownMenuItem<String>> getDropDownMenuItems() {
List<DropdownMenuItem<String>> items = List();
for (String catmenu in _categorymenu) {
items.add(DropdownMenuItem(value: catmenu, child: Text(catmenu)));
}
return items;
}
@override
void dispose() {
_textEditingMenu.dispose();
_textEditingPrice.dispose();
super.dispose();
}
@override
void initState() {
_dropDownMenuItems = getDropDownMenuItems();
_currentCategory = _dropDownMenuItems[0].value;
crudObj.getDataMenu().then((results) {
setState(() {
menu = results;
});
});
super.initState();
}
@override
Widget build(BuildContext context) {
_width = MediaQuery.of(context).size.width;
_height = MediaQuery.of(context).size.height;
return Container(
child: Column(
children: <Widget>[
Container(
width: _width,
height: 70,
child: Card(
elevation: 2,
color: Colors.amber[300],
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.all(Radius.circular(10))),
child: Row(
children: <Widget>[
Container(
alignment: Alignment.topLeft,
margin: EdgeInsets.all(10),
child: IconButton(
icon: Icon(FontAwesomeIcons.search),
onPressed: () {},
),
),
Padding(
padding: EdgeInsets.all(295),
),
Container(
alignment: Alignment.topRight,
margin: EdgeInsets.all(10),
child: IconButton(
icon: Icon(FontAwesomeIcons.plus),
onPressed: () {
addMenu(context);
},
),
),
],
),
),
),
Container(
width: _width,
height: 584,
child: Card(
elevation: 2,
color: Colors.lightBlueAccent[100],
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.all(Radius.circular(10))),
child: Container(child: _menuList()),
),
),
],
),
);
}
// void changedDropDownItem(String selectedCategory) {
// setState(() {
// _currentCategory = selectedCategory;
// });
// }
Future<bool> addMenu(BuildContext context) async {
return showDialog(
context: context,
barrierDismissible: false,
builder: (BuildContext context) {
return AlertDialog(
title: Text('Add Menu', style: TextStyle(fontSize: 15.0)),
content: Container(
height: 300,
width: 300,
child: Column(
children: <Widget>[
TextField(
controller: _textEditingMenu,
textInputAction: TextInputAction.next,
decoration: InputDecoration(hintText: 'Enter Menu Name'),
onChanged: (value) {
this.menuName = value;
},
),
SizedBox(height: 5.0),
TextField(
controller: _textEditingPrice,
keyboardType: TextInputType.number,
decoration: InputDecoration(hintText: 'Enter Price'),
onChanged: (value) {
this.menuPrice = value;
},
),
SizedBox(height: 5.0),
DropdownButton(
isExpanded: true,
value: _currentCategory,
items: _dropDownMenuItems,
onChanged: (String value) {
setState(() {
_currentCategory = selectedCategory;
});
menuCategory = value;
},
),
SizedBox(height: 5.0),
Row(
children: <Widget>[
FlatButton(
child: Text('Add'),
textColor: Colors.blue,
onPressed: () {
if (!UtilsImporter()
.commanUtils
.validateMenuName(menuName)) {
UtilsImporter().commanUtils.showToast(
UtilsImporter().stringUtils.retrunMenuName,
context);
} else if (!UtilsImporter()
.commanUtils
.validateGuestPax(menuPrice)) {
UtilsImporter().commanUtils.showToast(
UtilsImporter().stringUtils.returnMenuPrice,
context);
} else if (!UtilsImporter()
.commanUtils
.validateMenuCategory(menuCategory)) {
UtilsImporter().commanUtils.showToast(
UtilsImporter().stringUtils.returnMenuCat,
context);
} else {
crudObj.addMenu({
'menuName': this.menuName,
'menuPrice': this.menuPrice,
'menuCategory': this.menuCategory,
}).then((result) {
// dialogTrigger(context);
}).catchError((e) {
print(e);
});
Navigator.of(context).pop();
// Navigator.of(context).pop();
// Navigator.of(context)
// .pushReplacementNamed('/Dashboard');
}
},
),
Padding(
padding: EdgeInsets.all(60),
),
FlatButton(
child: Text('Return'),
textColor: Colors.blue,
onPressed: () {
Navigator.of(context).pop();
},
)
],
),
],
),
),
);
});
}
}
class MenuPage扩展StatefulWidget实现HasLayoutGroup{
菜单页({Key-Key,this.layoutGroup,this.onLayoutToggle}):超级(Key:Key);
最终布局组布局组;
最终VoidCallback onLayoutToggle;
@凌驾
_MenuPageState createState()=>MenuPageState();
}
类_MenuPageState扩展状态{
双倍宽度;
双倍高度;
字符串菜单名;
弦菜单;
弦函数范畴;
字符串选择类别;
最终格式价格=NumberFormat.simpleCurrency();
var菜单;
crudMedthods crudObj=新的crudMedthods();
清单_categorymenu=[“食品”、“饮料”、“酒类”、“电力”、“其他”];
最终_textededitingmenu=textededitingcontroller();
最终_textEditingPrice=TextEditingController();
列表-下拉菜单项;
字符串currentCategory;
列表getDropDownMenuItems(){
列表项=列表();
用于(类别菜单中的字符串catmenu){
添加(DropdownMenuItem(值:catmenu,子项:Text(catmenu)));
}
退货项目;
}
@凌驾
无效处置(){
_textEditingMenu.dispose();
_textEditingPrice.dispose();
super.dispose();
}
@凌驾
void initState(){
_dropDownMenuItems=getDropDownMenuItems();
_currentCategory=\u dropDownMenuItems[0]。值;
crudObj.getDataMenu().then((结果){
设置状态(){
菜单=结果;
});
});
super.initState();
}
@凌驾
小部件构建(构建上下文){
_宽度=MediaQuery.of(context).size.width;
_height=MediaQuery.of(context).size.height;
返回容器(
子:列(
儿童:[
容器(
宽度:_宽度,
身高:70,
孩子:卡片(
标高:2,
颜色:颜色。琥珀色[300],
形状:圆形矩形边框(
borderRadius:borderRadius.all(半径.圆形(10)),
孩子:排(
儿童:[
容器(
对齐:alignment.topLeft,
保证金:所有(10),
孩子:我的钮扣(
图标:图标(FontAwesomeIcons.search),
按下:(){},
),
),
填充物(
填充:边缘设置。全部(295),
),
容器(
对齐:alignment.topRight,
保证金:所有(10),
孩子:我的钮扣(
图标:图标(FontAwesomeIcons.plus),
已按下:(){
添加菜单(上下文);
},
),
),
],
),
),
),
容器(
宽度:_宽度,
身高:584,
孩子:卡片(
标高:2,
颜色:Colors.lightBlueAccent[100],
形状:圆形矩形边框(
borderRadius:borderRadius.all(半径.圆形(10)),
子:容器(子:_menuList()),
),
),
],
),
);
}
//void changedDropDownItem(字符串选择类别){
//设置状态(){
//\u currentCategory=所选类别;
// });
// }
未来添加菜单(构建上下文上下文)异步{
返回显示对话框(
上下文:上下文,
禁止:错误,
生成器:(BuildContext上下文){
返回警报对话框(
标题:文本(“添加菜单”,样式:TextStyle(fontSize:15.0)),
内容:容器(
身高:300,
宽度:300,
子:列(
儿童:[
文本字段(
控制器:_text编辑菜单,
textInputAction:textInputAction.next,
装饰:输入装饰(hintText:“输入菜单名”),
一旦更改:(值){
this.menuName=值;
},
),
尺寸箱(高度:5.0),
文本字段(
控制器:_textededitingprice,
键盘类型:TextInputType.number,
装饰:输入装饰(hintText:“输入价格”),
一旦更改:(值){
this.menuPrice=值;
},
),
尺寸箱(高度:5.0),
下拉按钮(
是的,
值:_currentCategory,
项目:_下拉菜单项,
onChanged:(字符串值){
设置状态(){
_currentCategory=selectedCategory;
});
menuCategory=值;
},
),
尺寸箱(高度:5.0),
划船(
儿童:[
扁平按钮(
子项:文本('Add'),
textColor:Colors.blue,
已按下:(){
如果(!UtilsImporter()
.commanUtils
.validateUname(menuName)){
UtilsImporter().comm
final myController1 = TextEditingController();
final myController2 = TextEditingController();
@override
void dispose() {
// Clean up the controller when the widget is removed from the
// widget tree.
myController1.dispose();
myController2.dispose();
super.dispose();
}