每次调用setstate时,randomSel变量List都会更新,我想停止此操作
void main() => runApp(MyApp());
class MyApp extends StatefulWidget {
@override
State<StatefulWidget> createState() {
return MyColorBook();
}
}
class MyColorBook extends State<MyApp> {
List randomSel = new List<int>.generate(16, (int index) => index + 1);
var accepted = List<bool>.generate(16, (i) => false);
initState() {
super.initState();
}
答案 0 :(得分:0)
您可以将其置于类之外,以使其成为全局变量:
void main() => runApp(MyApp());
class MyApp extends StatefulWidget {
@override
State<StatefulWidget> createState() {
return MyColorBook();
}
}
List randomSel = new List<int>.generate(16, (int index) => index + 1);
var accepted = List<bool>.generate(16, (i) => false);
class MyColorBook extends State<MyApp> {
initState() {
super.initState();
}
或者您可以将这些数据放在一个类中:
class Data{
List randomSel = new List<int>.generate(16, (int index) => index + 1);
var accepted = List<bool>.generate(16, (i) => false);}
,如果您想访问它: 初始化数据:
Data data = Data();
并通过以下方式访问randomSel:
data.randomSel