Flutter 'type' Icon '不是类型' IconData '的子类型

我将IconData作为Widget的参数传递，但我收到错误，指出类型‘Icon’不是类型Case中的类型‘IconData’的子类型. 我试了这么多问题，但都不能帮我改正错误.

我试过这个问题:

How to solve "IconData' is not a subtype of type 'Widget'"?

Category.dart个

import 'package:flutter/material.dart';

class Catgory extends StatelessWidget {
  final String Txt;
  const Catgory({super.key, required this.Txt});

  @override
  Widget build(BuildContext context) {

    return   Scaffold(
           body: category_card(name: Txt),
          );
  }
}
double defaultRadius = 8.0;
class category_card extends StatefulWidget {
  final String name;
  const category_card({super.key, required this.name});

  @override
  State<category_card> createState() => _category_cardState();
}

class _category_cardState extends State<category_card> {
  @override
  Widget build(BuildContext context) {
    return  Directionality(
      textDirection: TextDirection.rtl,
      child: Scaffold(
        backgroundColor: Colors.white,
        appBar: AppBar(
          leading: IconButton(
            icon: const Icon(Icons.arrow_back, color: MyColorsSample.primaryDark),
            onPressed: () => Navigator.pop(context),
          ),
          title:  Text('طالع بینی ماه '+widget.name, style: const TextStyle(color: MyColorsSample.primaryDark),),
          backgroundColor: Colors.white,
          elevation: 0,
        ),

        body: SingleChildScrollView(
          padding: const EdgeInsets.all(8),
          scrollDirection: Axis.vertical,
          child: Row(
            children: [
              Column(
                children: [
                Row(
                  children: [
                    // gradientCardSample("کلی", 12, context, IconData(Icon(Icons.ac_unit) as int)),
                    const SizedBox(width: 10,),
                    gradientCardSample("عشق", 12, context, const Icon(Icons.book, size: 20, color: Colors.blue,) as IconData),
                  ]

             
              //
                  ),
                ]
              ),

            ],
          ),
        ),
      ),

    );
  }
}


Widget gradientCardSample(String title, int hint, BuildContext mcontext, IconData icon) {
  return Builder(
    builder: (context)=> InkWell(
      splashColor: Colors.black.withAlpha(30),
      onTap: () {
        debugPrint('Card tapped.');

        // Navigator.of(mcontext).push(MaterialPageRoute(builder: (mcontext) => const Catgory(Txt: "hi")));


      },
      child: Container(
        height: 120,
        width: 180,
        padding:  const EdgeInsets.all(10),
        decoration: BoxDecoration(
            gradient: const LinearGradient(
              begin: Alignment.topLeft,
              end: Alignment.bottomRight,
              colors: [ Color(0xFF846AFF), Color(0xFF755EE8), Colors.blueAccent,Colors.blue,],
            ),
            borderRadius: radius(16)),
        clipBehavior: Clip.hardEdge,

        child: Row(

          children: [
            Column(
              mainAxisAlignment: MainAxisAlignment.start,
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                const SizedBox(height: 10,),
                Text(title, style: const TextStyle(fontSize: 20, color: Colors.white, )),
              ],

            ),
            //, style: boldTextStyle(color: Colors.white, size: 20)
            const Spacer(),

             Icon(
              icon
            ),

          ],

        ),

      ),
    ),
  );
}

/// returns Radius
BorderRadius radius([double? radius]) {
  return BorderRadius.all(radiusCircular(radius ?? defaultRadius));
}
/// returns Radius
Radius radiusCircular([double? radius]) {
  return Radius.circular(radius ?? defaultRadius);
}


}