在使用setState时，WidgetsBinding.instance.addPostFrameCallback被多次调用

void _updateState() {
  WidgetsBinding.instance.removePostFrameCallback(_callback);
  setState(() {
    // 更新状态
  });
}

void _callback(Duration duration) {
  // 执行回调操作
}

@override
void initState() {
  super.initState();
  WidgetsBinding.instance.addPostFrameCallback(_callback);
}

@override
void dispose() {
  WidgetsBinding.instance.removePostFrameCallback(_callback);
  super.dispose();
}

class MyWidget extends StatefulWidget {
  @override
  _MyWidgetState createState() => _MyWidgetState();
}

class _MyWidgetState extends State<MyWidget> with SingleTickerProviderStateMixin {
  AnimationController _controller;

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

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

  @override
  Widget build(BuildContext context) {
    return Container(
      // 使用动画控制器进行动画操作
      child: AnimatedBuilder(
        animation: _controller,
        builder: (context, child) {
          // 构建动画效果
          return Container();
        },
      ),
    );
  }
}