我使用Map函数构建了多选芯片。当选择一个芯片时,芯片的颜色会变成黄色。当选择芯片时,会打印出所选芯片。我想选择芯片并显示其中被取消选中的芯片。可以做到吗?如果可以,如何实现?
代码:
List<String> hobbyList = [
'Shopping',
'Brunch',
'Music',
'Road Trips',
'Tea',
'Trivia',
'Comedy',
'Clubbing',
'Drinking',
'Wine',
];
List<String>? selectedHobby = [];
Column(
children: <Widget>[
const SizedBox(height: 16),
Wrap(
children: hobbyList.map(
(hobby) {
bool isSelected = false;
if (selectedHobby!.contains(hobby)) {
isSelected = true;
}
return GestureDetector(
onTap: () {
if (!selectedHobby!.contains(hobby)) {
if (selectedHobby!.length < 50) {
selectedHobby!.add(hobby);
setState(() {});
print(selectedHobby);
}
} else {
selectedHobby!.removeWhere(
(element) => element == hobby);
setState(() {});
print(selectedHobby);
}
},
child: Container(
margin: const EdgeInsets.symmetric(
horizontal: 5, vertical: 4),
child: Container(
padding: const EdgeInsets.symmetric(
vertical: 5, horizontal: 12),
decoration: BoxDecoration(
color: isSelected
? HexColor('#F5F185')
: HexColor('#D9D9D9'),
borderRadius:
BorderRadius.circular(18),
border: Border.all(
color: isSelected
? HexColor('#F5F185')
: HexColor('#D9D9D9'),
width: 2)),
child: Text(
hobby,
style: TextStyle(
color: isSelected
? Colors.black
: Colors.black,
fontSize: 14,
fontWeight: FontWeight.w600),
),
),
),
);
},
).toList(),
),
],
),
选定的项目会显示为这样。 在此输入图片描述
那么如何显示未被选定的项目呢?