单选列表

需求：只选数组中的某一值，但选择了一个值时其他的不会被选择

方法：将数组遍历出来，再额外声明一个变量a；然后将遍历出来的index赋值给变量a;此时只需判断index是否等于a;当index==a时，该值被选择

声明一个数组并将其遍历出来

int selectIndex =0;
List model = [1,2,3,4,5];
Column(
       children: model.map((index){
                 return InkWell(
                        onTap:(){
                            setState((){selectIndex =index;},
              )
           }
         );
       }).toList;
      ),
      
//代码的关键比较 当selectIndex和index一致的时候则选中  
if(selectIndex==index){
    print("选择了该值");
}

多选列表

 int roomExistPeople = 10;
 bool isSelect = false;
 List<bool> isSelectedList = [];

ListView(
                  children: List.generate(
                    roomExistPeople,
                    (index) {
                      return CheckboxListTile(
                        title: Text(
                          'name。。。。。',
                          style: TextStyle(
                            fontSize: 10.sp,
                            color: Colors.black,
                          ),
                        ),
                        value: isSelectedList.isEmpty
                            ? false
                            : isSelectedList[index],
                        onChanged: (bool value) {
                          setState(() {
                            if (isSelectedList.isEmpty) {
                              isSelectedList = List.generate(
                                  roomExistPeople, (index) => false);
                            }
                            isSelectedList[index] = value;
                            print(
                              isSelectedList
                                  .asMap()
                                  .entries
                                  .where((element) => element.value == true)
                                  .map((e) => e.key)
                                  .join(','),
                            );
                          });
                        },
                      );
                    },
                  ),
                ),