（Flutter）图标动画

CODE

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: 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 AnimationController _animationController;

  @override
  void initState() {
    super.initState();
    _animationController = AnimationController(
      vsync: this,
      duration: Duration(seconds: 1),
    );
    _animationController.reverse();
  }

  bool ifPlaying = false;
  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(),
        body: Center(
          child: GestureDetector(
            onTap: (){
              ifPlaying = !ifPlaying;
              if (ifPlaying) {
                _animationController.forward();
              } else {
                _animationController.reverse();
              }
            },

            child: AnimatedIcon(
              icon: AnimatedIcons.play_pause,
              progress: _animationController,
              size: 150,
            ),
          ),
        ));
  }
}

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