animation - 使动画随着 flutter 而弹跳

Question

当我点击一个按钮时，我尝试制作一个弹跳动画(快速上下移动)。

像这个例子:

我成功制作了弹跳动画但是我没有成功制作点击，因为我的icone按钮总是显示，我搜索只是为了让这个icone按钮在点击后上下增长，没有消失

Answer 1

SOURCE

void main() => runApp(MaterialApp(home: Avatar()));

class Avatar extends StatefulWidget {
  @override
  State<StatefulWidget> createState() => _Avatar();
}

class _Avatar extends State<Avatar> with TickerProviderStateMixin {
  AnimationController _controller;

  @override
  void initState() {
    super.initState();

    _controller = AnimationController(duration: const Duration(milliseconds: 700), vsync: this);
    _controller.repeat(reverse: true);
  }
  
  @override
  void dispose(){
     super.dispose();
     this._controller.dispose();
  }


  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Stack(
        children: <Widget>[
          Align(
            child: ScaleTransition(
              scale: Tween(begin: 0.75, end: 2.0)
                .animate(CurvedAnimation(
                  parent: _controller, 
                  curve: Curves.elasticOut
                )
              ),
              child: SizedBox(
                height: 100,
                width: 100,
                child: CircleAvatar(backgroundImage: AssetImage(chocolateImage)),
              ),
            ),
          ),
        ],
      ),
    );
  }
}