我有一个ListView。我需要根据用户点击来更改leading:的{{1}}属性。 UI不会因交互而改变。它在ListTile
我有Hot Restart这样的设置
Appmodel我有这样的class AppModel extends ChangeNotifier {
final _saved = Set<String>();
Set<String> getApps() => _saved;
addApp(String apkPath) {
_saved.add(apkPath);
ChangeNotifier();
}
removeApp(String apkPath) {
_saved.remove(apkPath);
ChangeNotifier();
}
}
main.dart我的Widget build(BuildContext context) {
return MultiProvider(
providers: [
ChangeNotifierProvider<AppModel>(
create: (_) => AppModel(),
),
FutureProvider<List<Application>>(
create: (_) => appService.fetchCountries(),
),
],
child: MaterialApp(
debugShowCheckedModeBanner: false,
title: 'Countries List',
theme: ThemeData(primaryColor: Colors.green),
home: Home(),
),
);
}
这样
ListView答案 0 :(得分：1)
如果需要通过notifyListeners（）调用进行某些更改，则需要通知侦听器：
class AppModel extends ChangeNotifier {
final _saved = Set<String>();
Set<String> getApps() => _saved;
addApp(String apkPath) {
_saved.add(apkPath);
notifyListeners();
}
removeApp(String apkPath) {
_saved.remove(apkPath);
notifyListeners();
}
}