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我目前正在处理一个应用程序，我有一个警告，我无法摆脱...

摘要：一个 RenderFlex 在右侧溢出了 34 个像素 -> 当您按下按钮以使用 AnimatedController 扩展容器的宽度时。

我在 Scaffold 中使用了一个自定义的 floatingActionButton，当按下它时会延伸到屏幕的末尾并显示 2 个选项。按钮的位置在右下角，我希望当你按下它时它会向左延伸并出现两排按钮。

当您按下按钮时，上面指定的警告出现和消失。我尝试使用 Expanded 但没有成功...我附上代码：

import 'package:flutter/material.dart';

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

  @override
  AnimatedContainerButtonState createState() => AnimatedContainerButtonState();
}

class AnimatedContainerButtonState extends State<AnimatedContainerButton> {
  bool _isExpanded = false;
  late double _screenWidth;

  void closeMenu() {
    setState(() {
      _isExpanded = false;
    });
  }

  void openMenu() {
    setState(() {
      _isExpanded = true;
    });
  }

  @override
  Widget build(BuildContext context) {
    _screenWidth = MediaQuery.of(context).size.width;

    return AnimatedContainer(
      curve: Curves.easeInBack,
      duration: Duration(milliseconds: 500),
      height: 50,
      width: _isExpanded ? _screenWidth - 35 : 50,
      decoration: BoxDecoration(
        color: Colors.purple,
        borderRadius: BorderRadius.all(
          Radius.circular(50),
        ),
      ),
      child: Expanded(
        child: _isExpanded
            ? Row(
                crossAxisAlignment: CrossAxisAlignment.center,
                mainAxisAlignment: MainAxisAlignment.spaceAround,
                children: <Widget>[
                  InkWell(
                    child: Column(
                      children: <Widget>[
                        Icon(Icons.flutter_dash_rounded),
                        Text(
                          "Item1",
                          style: TextStyle(
                            color: Colors.white,
                            fontWeight: FontWeight.bold,
                          ),
                        ),
                      ],
                    ),
                  ),
                  InkWell(
                    child: Column(
                      children: <Widget>[
                        Icon(Icons.flutter_dash_rounded),
                        Text(
                          "Item2",
                          style: TextStyle(
                            color: Colors.white,
                            fontWeight: FontWeight.bold,
                          ),
                        ),
                      ],
                    ),
                  ),
                ],
              )
            : IconButton(
                color: Colors.white,
                icon: Icon(Icons.add),
                onPressed: () {
                  openMenu();
                },
              ),
      ),
    );
  }
}
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