Flutter中提取验证码输入框组件

    import 'package:flutter/material.dart';
    
    class ValidataInputBoxWidget extends StatefulWidget {
      ValidataInputBoxWidget({Key key, this.onChange, this.icon,this.getValidata}) : super(key: key);
    
      final IconData icon; //输入框icon materialIcon
      final onChange; //输入框change事件
      final getValidata;//点击获取验证码按钮事件
    
      @override
      State<StatefulWidget> createState() {
    return ValidataInputBoxWidgetBuilder();
      }
    }
    
    class ValidataInputBoxWidgetBuilder extends State<ValidataInputBoxWidget> {
      Widget build(BuildContext context)