質問編集履歴
1
ご指摘をいただき、コードをフルで載せました。もともとのコードでは正しく動作するのですが、該当のコードではグルグル画面のままで遷移しません。文字数の関係で多少コードは削除してます
test
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File without changes
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test
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@@ -3,8 +3,6 @@
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3
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flutterのproviderをriverpodで置き換えようと思ったが、
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CircularProgressIndicatorのグルグル画面のままで遷移しなくなった。
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-
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### 実現したいこと
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このグルグルから遷移しない状態を解消してリスト表示に遷移したいが、どの記述を直せばいいのかわからないので教えて欲しいです。
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@@ -12,8 +10,37 @@
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### 該当のソースコード
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-
```dart
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+
```forth_page.dart
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class ForthPage extends StatelessWidget {
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ForthPage({Key? key}) : super(key: key);
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//更新をsnackbarに通知したい時に必要
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final GlobalKey<ScaffoldMessengerState> _scaffoldKey =
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GlobalKey<ScaffoldMessengerState>();
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@override
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Widget build(BuildContext context) {
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return ScaffoldMessenger(
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key: _scaffoldKey,
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child: Scaffold(
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appBar: AppBar(
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backgroundColor: Color.fromARGB(255, 236, 124, 5),
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title: const Text(
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'Forth',
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style: TextStyle(
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fontWeight: FontWeight.bold,
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),
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),
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actions: [
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Icon(Icons.laptop_chromebook),
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SizedBox(width: 24),
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Icon(Icons.search),
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SizedBox(width: 24),
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Icon(Icons.menu),
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SizedBox(width: 24),
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],
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),
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body: Center(
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body: Center(
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child: Consumer(builder: (context, ref, child) {
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final ForthpageModel forthpageModel = ref.watch(forthpageProvider);
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final List<Book>? books = forthpageModel.books;
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@@ -29,11 +56,131 @@
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title: Text(book.title),
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subtitle: Text(book.author),
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),
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endActionPane: ActionPane(
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motion: ScrollMotion(),
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children: [
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SlidableAction(
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// An action can be bigger than the others.
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label: '編集',
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flex: 1,
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onPressed: (BuildContext context) async {
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final bool? added = await Navigator.push(
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context,
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MaterialPageRoute(
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builder: (context) => EditBookPage(book),
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//編集画面でタイトルと著者を最初から残したいから引数book
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),
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);
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if (added != null && added) {
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final snackBar = SnackBar(
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backgroundColor:
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Color.fromARGB(255, 93, 246, 111),
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content: Text('本を更新しました'),
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);
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_scaffoldKey.currentState?.showSnackBar(snackBar);
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}
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},
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backgroundColor: Color.fromARGB(255, 126, 126, 126),
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foregroundColor: Colors.white,
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icon: Icons.edit,
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),
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SlidableAction(
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label: '削除',
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onPressed: (BuildContext context) async {
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await showMyDialog(context, book, forthpageModel);
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},
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backgroundColor: Color.fromARGB(255, 211, 63, 63),
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foregroundColor: Colors.white,
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icon: Icons.delete,
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),
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],
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),
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),
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)
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.toList();
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return ListView(
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children: widgets,
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);
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}),
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),
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),
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);
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}
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```
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```forth_model.dart
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final forthpageProvider = ChangeNotifierProvider(
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(ref) => ForthpageModel()
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);
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//firebaseの値をとってくるページ
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class ForthpageModel extends ChangeNotifier {
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User? currentUser = null;
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void setCurrentUser() {
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currentUser = FirebaseAuth.instance.currentUser;
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notifyListeners();
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}
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final Stream<QuerySnapshot> _usersStream =
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FirebaseFirestore.instance.collection('books').snapshots();
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List<Book>? books;
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void fetchBooklist() {
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_usersStream.listen((QuerySnapshot snapshot) {
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final List<Book> books = snapshot.docs.map((DocumentSnapshot document) {
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Map<String, dynamic> data = document.data()! as Map<String, dynamic>;
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final String id = document.id; //idはランダムに割り振っているのでこれが必要
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final String title = data['title'];
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final String author = data['author'];
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final String? imgURL = data['imgURL'];
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return Book(id, title, author, imgURL);
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}).toList();
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this.books = books;
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notifyListeners();
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});
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}
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```
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150
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### もともとのコード
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35
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-
```dart
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151
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+
```forth_page.dart
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152
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+
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153
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class ForthPage extends StatelessWidget {
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154
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ForthPage({Key? key}) : super(key: key);
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155
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+
//更新をsnackbarに通知したい時に必要
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156
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+
final GlobalKey<ScaffoldMessengerState> _scaffoldKey =
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GlobalKey<ScaffoldMessengerState>();
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158
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@override
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Widget build(BuildContext context) {
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return ChangeNotifierProvider<ForthpageModel>(
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create: (_) => ForthpageModel()..fetchBooklist(),
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child: ScaffoldMessenger(
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key: _scaffoldKey,
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child: Scaffold(
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appBar: AppBar(
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backgroundColor: Color.fromARGB(255, 236, 124, 5),
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title: const Text(
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'Forth',
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style: TextStyle(
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fontWeight: FontWeight.bold,
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),
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),
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actions: [
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175
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Icon(Icons.laptop_chromebook),
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SizedBox(width: 24),
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Icon(Icons.search),
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SizedBox(width: 24),
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Icon(Icons.menu),
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180
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SizedBox(width: 24),
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],
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),
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body: Center(
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body: Center(
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child: Consumer<ForthpageModel>(builder: (context, model, child) {
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final List<Book>? books = model.books;
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@@ -48,9 +195,78 @@
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title: Text(book.title),
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subtitle: Text(book.author),
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),
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endActionPane: ActionPane(
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motion: ScrollMotion(),
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children: [
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SlidableAction(
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// An action can be bigger than the others.
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203
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label: '編集',
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flex: 1,
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205
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onPressed: (BuildContext context) async {
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206
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final bool? added = await Navigator.push(
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context,
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MaterialPageRoute(
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builder: (context) => EditBookPage(book),
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210
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//編集画面でタイトルと著者を最初から残したいから引数book
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211
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),
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);
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if (added != null && added) {
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final snackBar = SnackBar(
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backgroundColor:
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Color.fromARGB(255, 93, 246, 111),
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content: Text('本を更新しました'),
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);
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_scaffoldKey.currentState
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?.showSnackBar(snackBar);
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}
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},
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backgroundColor: Color.fromARGB(255, 126, 126, 126),
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foregroundColor: Colors.white,
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icon: Icons.edit,
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),
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SlidableAction(
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label: '削除',
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onPressed: (BuildContext context) async {
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await showMyDialog(context, book, model);
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},
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backgroundColor: Color.fromARGB(255, 211, 63, 63),
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foregroundColor: Colors.white,
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icon: Icons.delete,
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),
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],
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),
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),
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)
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.toList();
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return ListView(
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children: widgets,
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);
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}),
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),
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),
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);
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}
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-
```
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```
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-
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250
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```forth_model.dart
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251
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+
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53
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-
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252
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class ForthpageModel extends ChangeNotifier {
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-
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253
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final Stream<QuerySnapshot> _usersStream =
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55
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-
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254
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FirebaseFirestore.instance.collection('books').snapshots();
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255
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+
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56
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-
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256
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List<Book>? books;
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257
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+
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258
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void fetchBooklist() {
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259
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_usersStream.listen((QuerySnapshot snapshot) {
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260
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final List<Book> books = snapshot.docs.map((DocumentSnapshot document) {
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261
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Map<String, dynamic> data = document.data()! as Map<String, dynamic>;
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262
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final String id = document.id; //idはランダムに割り振っているのでこれが必要
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263
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final String title = data['title'];
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264
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final String author = data['author'];
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265
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return Book(id, title, author);
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}).toList();
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267
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+
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this.books = books;
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269
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notifyListeners();
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270
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});
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}
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272
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```
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