Flutter Hero动画

class HeroAnimationWidgetA extends StatefulWidget {
  const HeroAnimationWidgetA({Key? key, required this.title}) : super(key: key);
  final String title;

  @override
  State<HeroAnimationWidgetA> createState() {
    return HeroAnimationStateA();
  }
}

class HeroAnimationStateA extends State<HeroAnimationWidgetA> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text(widget.title)),
      body: Container(
        alignment: Alignment.topCenter,
        child: Column(
          children: <Widget>[
            InkWell(
              child: Hero(
                  tag: "avatar",
                  child: ClipOval(
                    child: Image.asset("images/avatar.png", width: 50),
                   ),
              ),
              onTap: () {
                Navigator.push(
                  context,
                  PageRouteBuilder(
                    pageBuilder: (context, animation, secondaryAnimation) {
                      return FadeTransition(
                        opacity: animation,
                        child: Scaffold(
                          appBar: AppBar(title: const Text("原图")),
                          body: const HeroAnimationWidgetB(),
                        ),
                      );
                    },
                  ),
                );
              },
            ),
            const Padding(
              padding: EdgeInsets.only(top: 10),
              child: Text("点击头像"),
            ),
          ],
        ),
      ),
    );
  }
}

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

  @override
  Widget build(BuildContext context) {
    return Center(
      child: Hero(
        tag: "avatar",
        child: Image.asset("images/avatar.png"),
      ),
    );
  }
}

点击前效果	点击后效果