【发布时间】：2022-08-13 00:17:07
【问题描述】：
我有三个按钮。我可以选择（激活）的最大值只有一个按钮。切换按钮时，我已经激活应该是true，而不是激活-false。我在 SharedPreferences 中为每个按钮写入这些值，存储 true 或 false。当我打开页面时，我会获取有关这些按钮的数据，并以紫色显示我选择并保存的按钮。但是我遇到了一个错误，我无法切换到另一个按钮，我总是选择一个并且它没有改变。可能是什么问题呢？
enum VoltageMode {
ac,
dc,
all,
}
class _FilterDialogState extends State<FilterDialog> {
VoltageMode? selectedMode;
@override
Widget build(BuildContext context) {
return BlocBuilder<MapPreferencesCubit, MapPreferencesState>(
builder: (context, statePreferences) {
final MapPreferencesCubit mapPreferencesCubit =
BlocProvider.of<MapPreferencesCubit>(context);
if (statePreferences is MapPreferencesInitial) {
mapPreferencesCubit.getPreferences();
}
if (statePreferences is MapPreferencesLoaded) {
return BlocBuilder<MapfilterCubit, MapFilterState>(
builder: (context, stateFilter) {
final MapfilterCubit mapFilterCubit =
BlocProvider.of<MapfilterCubit>(context);
if (stateFilter is MapFilterInitial) {
mapFilterCubit.getFilter();
}
if (stateFilter is MapFilterLoaded) {
if (stateFilter.mapFilter.voltagePowerAC) selectedMode = VoltageMode.ac;
if (stateFilter.mapFilter.voltagePowerDC) selectedMode = VoltageMode.dc;
if (stateFilter.mapFilter.voltagePowerAll) selectedMode = VoltageMode.all;
return Padding(
padding:
const EdgeInsets.symmetric(horizontal: 21),
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
GestureDetector(
onTap: () => setState(() {
selectedMode = VoltageMode.ac;
}),
child: _buttonVoltage(
\'AC\', selectedMode == VoltageMode.ac),
),
const SizedBox(width: 16),
GestureDetector(
onTap: () => setState(() {
selectedMode = VoltageMode.dc;
}),
child: _buttonVoltage(
\'DC\', selectedMode == VoltageMode.dc),
),
const SizedBox(width: 16),
GestureDetector(
onTap: () => setState(() {
selectedMode = VoltageMode.all;
}),
child: _buttonVoltage(
\'All\', selectedMode == VoltageMode.all),
),
],
),
),
Padding(
padding:
const EdgeInsets.symmetric(horizontal: 21),
child: DefaultButtonGlow(
text: \'Done\',
onPressed: () {
mapFilterCubit
.setFilter(
MapFilter(
voltagePowerAC:
selectedMode == VoltageMode.ac,
voltagePowerDC:
selectedMode == VoltageMode.dc,
voltagePowerAll:
selectedMode == VoltageMode.all,
),
)
},
),
],
),
),
...
Widget _buttonVoltage(String nameButton, bool isActive) => Container(
padding: const EdgeInsets.symmetric(vertical: 11),
height: 40,
width: 87,
decoration: BoxDecoration(
color: isActive
? constants.Colors.purpleMain
: constants.Colors.white.withOpacity(0.15),
borderRadius: BorderRadius.circular(20),
border: Border.all(
color: isActive ? Colors.transparent : constants.Colors.greyDark,
),
boxShadow: [
BoxShadow(
color: isActive
? constants.Colors.purpleMain.withOpacity(0.34)
: Colors.transparent,
blurRadius: 10,
spreadRadius: 2,
offset: const Offset(0.0, 1.0)),
],
),
alignment: Alignment.center,
child:
Text(nameButton, style: constants.Styles.smallBoldTextStyleWhite),
);