小编Tou*_*ujo的帖子

现在我可以一次选择一项，但我想选择多项。我找到了一些用于多重选择的包，但想在不使用任何包的情况下实现。

  int? selectedIndex;
  final List<String> _wordName = [
    "Engaged in my Life",
    "Feel Alive",
    "Happy",
    "Love my Life",
  ];



GridView.builder(
                      scrollDirection: Axis.vertical,
                      gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
                        crossAxisCount: 2,
                        crossAxisSpacing: 3,
                        mainAxisSpacing: 2,
                        childAspectRatio: (16 / 8),
                      ),
                      itemCount: _wordName.length,
                      itemBuilder: (context, index) {
                        return GestureDetector(
                          onTap: () {
                            setState(() {
                              print("now selected ===>>> $index");
                              selectedIndex = index;
                              showButton = true;
                            });
                          },
                          child: Container(
                            margin: EdgeInsets.all(10),
                            decoration: BoxDecoration(
                              color: selectedIndex == index
                                  ? Color(0xffDEB988).withOpacity(0.2)
                                  : Color(0xffF4F4F6).withOpacity(0.5),
                              borderRadius: BorderRadius.circular(5.0),
                              border: Border.all(
                                  color: …