text fade-in animation

readme.md

text fade-in animation

Created with <3 with dartpad.dev.

Open with https://dartpad.dev/810896d72765464fbfc8a4179b1be96c

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main.dart

import 'package:flutter/material.dart';

const Color darkBlue = Color.fromARGB(255, 18, 32, 47);

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData.dark().copyWith(
        scaffoldBackgroundColor: darkBlue,
      ),
      debugShowCheckedModeBanner: false,
      home: const Scaffold(
        body: Center(
          child: MyHomePage(),
        ),
      ),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key}) : super(key: key);

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage>
    with SingleTickerProviderStateMixin {
  late final AnimationController _controller = AnimationController(
    vsync: this,
    duration: const Duration(milliseconds: 800),
  )..forward();

  late final Animation<Offset> _slideAnimation = Tween<Offset>(
    begin: const Offset(0, -0.5),
    end: Offset.zero,
  ).animate(CurvedAnimation(parent: _controller, curve: Curves.easeInOut));

  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
          child: SlideTransition(
        position: _slideAnimation,
        child: FadeTransition(
          opacity: _controller,
          child: Text('Hello World', style: textStyle),
        ),
      )),
    );
  }

  TextStyle? get textStyle => Theme.of(context).textTheme.headlineMedium;
}