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
这篇关于当所有 onTap 功能已用完时无法显示对话框的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！