当所有 onTap 功能已用完时无法显示对话框 [英] Unable to display a dialog box when the all the onTap feature has been exhausted
问题描述
因此，每当每个小部件的 onTap 按钮耗尽时，我都会尝试弹出一个对话框.我在这里附上了如何实现相同的代码片段.代码包含一堆处理数组，这就是为什么我为了获得结果而搞砸了.
So I am trying to pop out a dialog box whenever the onTap button for each widget is getting exhausted up. I am here with attaching my code snippet of how to implement the same. The code contains a bunch to deal with the array and which is why I am messed up to attain the result.
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
import 'dart:convert';
class Ticket {
Ticket({
this.tickets,
});
List<List<List<int>>> tickets;
factory Ticket.fromJson(Map<String, dynamic> json) => Ticket(
tickets: List<List<List<int>>>.from(json["tickets"].map((x) =>
List<List<int>>.from(
x.map((x) => List<int>.from(x.map((x) => x)))))),
);
Map<String, dynamic> toJson() => {
"tickets": List<dynamic>.from(tickets.map((x) => List<dynamic>.from(
x.map((x) => List<dynamic>.from(x.map((x) => x)))))),
};
}
class TicketPage extends StatefulWidget {
@override
_TicketPageState createState() => _TicketPageState();
}
class _TicketPageState extends State<TicketPage> {
var nos;
Ticket ticketList;
String apiResult;
Map<String, bool> cellStatus = {};
@override
void initState() {
super.initState();
_getNumbers();
}
_getNumbers() async {
var result = await http
.post(
'https://tickets-qzd55332wa-de.a.run.app/generateTickets?ticketsRequired=2')
.then((result) {
//Waits for the API response and assigns to apiResult variable
setState(() {
apiResult = result.body;
});
});
}
// List tick = [
// {
// 'tickets': [
// [
// [11, 5, 7, 10, 28, 9, 7, 74, 59],
// [1, 15, 7, 10, 8, 79, 27, 74, 9],
// [71, 5, 7, 20, 18, 9, 77, 74, 79],
// ],
// [
// [21, 5, 7, 80, 8, 9, 7, 74, 49],
// [31, 15, 7, 10, 18, 79, 7, 74, 19],
// [71, 5, 7, 20, 18, 79, 77, 74, 29],
// ],
// ]
// },
// ];
@override
Widget build(BuildContext context) {
var h = MediaQuery.of(context).size.height;
var w = MediaQuery.of(context).size.width;
if (apiResult == null) {
return Center(child: CircularProgressIndicator());
} else {
//Get an instance of Ticket from the API assigned to apiResponse variable
ticketList = Ticket.fromJson(json.decode(apiResult));
print('Tickets: ${ticketList.tickets}');
return Scaffold(
body: SafeArea(
child: Center(
child: Padding(
padding: const EdgeInsets.all(20.0),
child: Container(
decoration: BoxDecoration(
border: Border.all(
color: Colors.black,
)),
child: ListView.builder(
itemCount: ticketList.tickets.length,
itemBuilder: (BuildContext context, index) {
List tripleNumbersList = [];
List<Widget> cells = [];
List<Widget> rows = [];
//Get the lists of lists inside the 'tickets' list
tripleNumbersList = ticketList.tickets[index];
//Iterates over each list with other 3 lists
for (int j = 0; j < tripleNumbersList.length; j++) {
//Get one of the 3 lists
List<int> list = tripleNumbersList[j];
//Iterates over the list of numbers
for (int k = 0; k < list.length; k++) {
//Adds a Widget to 'cells; list for each number
cells.add(Container(
height: 35,
width: 35,
decoration: BoxDecoration(
border: Border.all(
color: Colors.black,
),
//color: Colors.pink
),
child: GestureDetector(
onTap: () {
print('Working');
if (cellStatus['$j$k'] ?? true) {
print('Working');
setState(() {
cellStatus.addAll({'$j$k': false});
});
}
},
child: list[k] != 0
? Text(
' ${list[k]} ',
style: TextStyle(
fontSize: 18.0,
fontWeight: FontWeight.bold),
)
: Text(''),
)));
}
//Adds the list of 'cells' in the 'rows' list
rows.add(Row(children: cells));
cells = [];
}
//Adds a empty row to make space
rows.add(Row(children: [
Container(
height: 10,
)
]));
return Center(
child: Container(
height: h / 3,
decoration: BoxDecoration(
border: Border.all(
color: Colors.black,
),
//color: Colors.pink
),
child: Column(
//Adds the list of rows to the column
children: rows,
),
),
);
},
),
),
),
),
),
);
}
}
}
```
上面的代码确实有一个 onTap 功能，一旦每个文本小部件被点击，onTap 功能就会被禁用.我试图实现，一旦每个 onTap 被禁用，就会弹出一个警报或一个对话框.
The above code does have an onTap feature where once every text widget is tapped out the onTap feature is being disabled. I am trying to attain that once every onTap is disabled an alert or a dialog box should pop out.
我收到的显示是这个
我被这个问题困住了，不知道如何解决它...请帮我指出我的错误以及如何实施相同的方法
I am stuck at this problem and have no clue how to solve it... Please help me out stating my mistakes and the ways to how to implement the same
推荐答案
根据我所见，首先您可以根据您的按钮创建一个字符串和布尔值的映射，如下所示:
Based on what I see, first you can create a map of string and boolean based on your buttons, something like this:
var _details = {'6':false,'15':false ... '86':false};
然后在每个按钮上单击，首先将其值更改为 true，然后检查是否所有值都为 true(这意味着所有按钮都被单击):
and then on each button click first change its value to true and then check if all values are true (which means all buttons are clicked):
_details['86']=true;
var result = _details.values.toList().indexWhere((element) => !element);
if(result == -1) // all values are true, which means all buttons are tapped
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