我是Flutter的新手,正在通过YouTube上的教程学习有关notodo_app的知识。因此,我按照相同的代码进行操作,并尝试重写了几乎所有内容,但当我开始使用initstate和setstate时遇到了问题。
与setstate相关的代码
final List<NoDoItem> _itemList = <NoDoItem>[];
@override
void initState() {
super.initState();
_readNoDoList();
}
void _handleSubmitted(String text) async {
_textEditingController.clear();
NoDoItem noDoItem = NoDoItem(text, DateTime.now().toIso8601String());
int savedItemId = await db.saveItem(noDoItem);
NoDoItem addedItem = await db.getItem(savedItemId);
setState(() {
_itemList.insert(0, addedItem);
});
print("Item saved id: $savedItemId");
}
_readNoDoList() async {
List items = await db.getItems();
items.forEach((item) {
NoDoItem noDoItem = NoDoItem.map(item);
print("Db items: ${noDoItem.itemName}");
});
}
我遇到了这个错误,无法提交任何内容。如果我正在使用模拟器,它会自动关闭。
E/flutter (23633): [ERROR:flutter/shell/common/shell.cc(184)] Dart Error: Unhandled exception:
E/flutter (23633): Stack Overflow
E/flutter (23633): #0 _Completer.completeError (dart:async/future_impl.dart:19:3)
E/flutter (23633): #1 _RootZone.runBinary (dart:async/zone.dart:1384:54)
E/flutter (23633): #2 _FutureListener.handleError (dart:async/future_impl.dart:143:20)
E/flutter (23633): #3 Future._propagateToListeners.handleError (dart:async/future_impl.dart:654:47)
E/flutter (23633): #4 Future._propagateToListeners (dart:async/future_impl.dart:675:24)
E/flutter (23633): #5 Future._completeError (dart:async/future_impl.dart:494:5)
E/flutter (23633): #6 _SyncCompleter._completeError (dart:async/future_impl.dart:55:12)
E/flutter (23633): #7 _Completer.completeError (dart:async/future_impl.dart:27:5)
E/flutter (23633): #8 _RootZone.runBinary (dart:async/zone.dart:1384:54)
E/flutter (23633): #9 _FutureListener.handleError (dart:async/future_impl.dart:143:2