flutter - 如何为每个切换按钮添加一个int值？ [ flutter ]

Question

我有三个切换按钮，如何为每个切换按钮添加一个int值？

 ToggleButtons(
   children: [
     Text('5 '),
     Text('6'),
     Text('7'),
   ],
   onPressed: (int index) {
     setState(() {
       for (int buttonIndex = 0;
         buttonIndex < isSelected2.length;
         buttonIndex++) {
         if (buttonIndex == index) {
           isSelected2[buttonIndex] = true;
         } else {
           isSelected2[buttonIndex] = false;
         }
       }
     });
   },
   isSelected: isSelected2,
 ),

Answer 1

您的问题并不十分清楚，但是我认为如果用户按下带有文本“5”的按钮，此值应应用于整数变量，该变量将在其他任何地方使用，可以这样实现:

...
int _choice;
...

ToggleButtons(
    children: [
        Text('5'),
        Text('6'),
        Text('7'),
    ],
    onPressed: (int index) {
        setState(() {
            isSelected2[index] = !isSelected2[index];
                switch(index){
                    case 0:
                        _choice = 5;
                        break;
                    case 1:
                        _choice = 6;
                        break;
                    case 2:
                        _choice = 7;
                        break;
                } 
            }
        );
    },
    isSelected: isSelected2,
),