NyFutureBuilder

• Introduction
• Customizing the NyFutureBuilder

Introduction to NyFutureBuilder

The NyFutureBuilder is a helpful widget for handling Future's in your Flutter projects. It will display a loader while the future is in progress, after the Future completes, it will return the data via the child parameter.

Let's dive into some code.

1. We have a Future that returns a String
2. We want to display the data on the UI for our user

// 1. Example future that takes 3 seconds to complete
Future<String> _findUserName() async {
  await sleep(3); // wait for 3 seconds
  return "John Doe";
}

// 2. Use the NyFutureBuilder widget
@override
Widget build(BuildContext context) {
  return Scaffold(
    body: SafeArea(
       child: Container(
         child: NyFutureBuilder<String>(future: _findUserName(), child: (context, data) {
           // data = "John Doe"
           return Text(data!);
         },),
       ),
    ),
  );
}

This widget will handle the loading on the UI for your users until the future completes.

Customizing the NyFutureBuilder

You can pass the following parameters to the NyFutureBuilder class to customize it for your needs.

Options:

@override
Widget build(BuildContext context) {
  return Scaffold(
    body: SafeArea(
       child: NyFutureBuilder(
         future: NyStorage.read("product_name"), 
         child: (context, data) {
            return Text(data);
         },
         loadingStyle: LoadingStyle.normal(child: Text("Loading...")), // change the default loader
         onError: (AsyncSnapshot snapshot) { // handle exceptions thrown from your future.
           print(snapshot.error.toString());
           return Text("Error");
         },
       )
    ),
  );
}