flutter-provider

问题 I'm trying to implement local database support in my flutter app which is being managed using Provider, now I want to make the retrieving of data obey the state management pattern, but I've been failing to. I've tried to make a traditional Provider to achieve this but the app got stuck in a loop of requests to the database, so after some search I found the FutureProvider, but I cant find how can I get a snapshot from the data being loaded class _ReceiptsRouteState extends State<ReceiptsRoute>

问题 I'm using Provider in my flutter app, and when I go to a new page, the data provided to the Provider at page 1 is not accessible in page 2. The way I understood the way Provider works, was that there is a central place where one stores all the data, and one can access that data anywhere in the application. So in my application, which is shown below, ToDoListManager is the place where all the data is stored. And if I set the data in Page 1 , then I will be able to access that data in Page 2 ,

问题 I'm working with Provider provider: ^4.1.2 I had 2 pages : A, B. Page A and B show same simple design, with below codes : PageA.dart class PageA extends StatelessWidget { var songTitle = ''; @override Widget build(BuildContext c) { return Column(children: <Widget>[ FloatingActionButton.extended( onPressed: () { // LOGIC : TRANSFER TO PAGE B AFTER CLICKED BUTTON FROM PAGE A Navigator.push(context, MaterialPageRoute( builder: (context) => PageB())); }, label: Text('Click'), ), ), Text('

问题 I'm working with Provider provider: ^4.1.2 I had 2 pages : A, B. Page A and B show same simple design, with below codes : PageA.dart class PageA extends StatelessWidget { var songTitle = ''; @override Widget build(BuildContext c) { return Column(children: <Widget>[ FloatingActionButton.extended( onPressed: () { // LOGIC : TRANSFER TO PAGE B AFTER CLICKED BUTTON FROM PAGE A Navigator.push(context, MaterialPageRoute( builder: (context) => PageB())); }, label: Text('Click'), ), ), Text('

问题 I'm new to Flutter and I'm spending some time about provider patter, I'm a PHP guy so I have a basic knowledge about it works, especially in Laravel framework. For me a provider is something that should manage data, retrive it from a DB, manipulate ad save. As far as I understand the concept is the same in flutter, but is quite difficult follow the docs. I have created a simple app that call a REST API and now I'd like to add the response to my provider to use the data in all my pages and

问题 I'm new to Flutter and I'm spending some time about provider patter, I'm a PHP guy so I have a basic knowledge about it works, especially in Laravel framework. For me a provider is something that should manage data, retrive it from a DB, manipulate ad save. As far as I understand the concept is the same in flutter, but is quite difficult follow the docs. I have created a simple app that call a REST API and now I'd like to add the response to my provider to use the data in all my pages and

问题 I'm currently dealing with a problem where I need some data from an API to show it into my widgets. I've following some Provider architecture pattern, where you setState two times: 1- When data is being fetched 2- When data is already fetched So the problem I'm currently dealing is, my widget throws the following error: setState() or markNeedsBuild() called during build. I know this error is because setState is called during build, but.. how can I fetch my api during build, and then show it

问题 // Are these the same? final model = Provider.of<Model>(context, listen: false); final model = context.read<Model>(); // Are these the same? final model = Provider.of<Model>(context); final model = context.watch<Model>(); Are they the same or aren't they? If they are, then why do I get this error when I use read inside the build() method, while Provider.of() works? Tried to use context.read<Model> inside either a build method or the update callback of a provider. 回答1: Well, they aren't the

问题 I'm still wrapping my head around state-management techniques in flutter and am a bit confused about when and why to use Provider.of<X> vs. Consumer<X> . I understand (I think) from the documentation that when choosing between these two you would use Provider.of when we want access to the data, but you don't need the UI to change. So the following (taken from the docs) gets access to the data and updates the UI on new events: return HumongousWidget( // ... child: AnotherMonstrousWidget(// <-

问题 I'm still wrapping my head around state-management techniques in flutter and am a bit confused about when and why to use Provider.of<X> vs. Consumer<X> . I understand (I think) from the documentation that when choosing between these two you would use Provider.of when we want access to the data, but you don't need the UI to change. So the following (taken from the docs) gets access to the data and updates the UI on new events: return HumongousWidget( // ... child: AnotherMonstrousWidget(// <-