For example, we can use ref. It is commonly used inside functions triggered by user interactions. This will be triggered when the widget is created but not yet built the UI. The ref.read method is a way to obtain the state of a provider without listening to it. Here, initState() is the entry point of the Stateful widget. description initState method Null safety protected mustCallSuper void initState ( ) Called when this object is inserted into the tree. Let's examine it, as it perfectly demonstrates our topic in a real-world scenario.įor demonstration purposes, here is a sample code. Using ref.read to obtain the state of a provider. In the initState() of the navigation widget, we call the initLocalStorage() on the WebLocalStorage service by reading its provider (webLocalStorageProvider), followed by the init() method of the LeftNavigationViewModel, which allows us to load the shared preferences upfront, then after ensuring a successful load, we can start pulling data from. The third option may not be the best in terms of architectural correctness, but is actually a fairly common approach in the Flutter world. InitState of the screen, trying to encapsulate this logic in the screen itself. If you want to keep your architecture nice and tidy, this would be the recommended approach. Initiate the loading procedure in BLoC, just before the screen presentation, when creating the BLoC itself or by using a coordinator object to start it for you.You are likely to load a lot of unnecessary data or block the user interface with spinners if you decide to fetch only the required portions of data. Fetch the data before displaying our screen and show it with the data pre-loaded.
In this case, we have several options where to initiate our request: To make this task challenging, upon opening a new screen we will have to initiate a network request to fetch something over the Internet. Subclasses of State should override initState to perform one-time initialization that depends on the BuildContext or the widget, which are available as the context and widget properties, respectively, when the initState method is called.
#Flutter provider in initstate how to
How to fetch initial data using provider in flutter effectievly. 1 Answer Sorted by: 2 As from the official documentation: The framework calls initState. How to consume provider inside another provider.
get new data with the provider and pulltorefresh. How to receive data from Provider inside another provider. As a conversation starter, let's assume that we are building an application with a standard How to use data from Provider during initState in Flutter application.
#Flutter provider in initstate code
In this article, I'd like to take you on a little journey into the depths of Flutter and learn more about scheduling code execution.
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