Visa/lib/detail/country_detail.dart

import 'dart:html';

import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';

class CountryDetailWidget extends StatelessWidget {
  const CountryDetailWidget({super.key});

  @override
  Widget build(BuildContext context) {
    return Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        Expanded(
          flex: 1,
          child: Column(
            children: [
              Container(
                margin: const EdgeInsets.only(top: 20),
                height: 150,
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: [
                    const Text(
                      "美国",
                      style: TextStyle(
                          fontSize: 24,
                          fontWeight: FontWeight.bold,
                          color: Colors.black),
                    ),
                    Image(
                      image: const AssetImage("images/logo.png"),
                      width: 200.w,
                      height: 150.w,
                    )
                  ],
                ),
              ),
              Container(
                color: Colors.grey[300],
                height: 60.h,
                width: 800.w,
                margin: EdgeInsets.only(top: 20.w),
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.start,
                  children: [
                    Row(
                      children: [
                        Text(
                          "签证须知：",
                          style: TextStyle(
                              fontSize: 14.sp,
                              color: Colors.red,
                              fontWeight: FontWeight.bold),
                        ),
                        Text(
                          "具体内容",
                          style: TextStyle(
                              fontSize: 14.sp,
                              color: Colors.black,
                              fontWeight: FontWeight.bold),
                        ),
                      ],
                    )
                  ],
                ),
              ),
              GestureDetector(
                onTap: () {
                  downLoadFile(
                      "https://cos.appmeta.cn/784d9b69a60cb8121d38116282d1f1092a6ce8ff.apk?sign=034f3922664559b086a14df30ffd0155&t=1678801947");
                },
                child: Container(
                  margin: EdgeInsets.only(top: 20.w),
                  child: Text(
                    "美国-旅游签证材料清单",
                    style: TextStyle(
                        fontSize: 14.sp,
                        color: Colors.red,
                        fontWeight: FontWeight.bold),
                  ),
                ),
              ),
              Container(
                margin: EdgeInsets.only(top: 20.w),
                child: Text(
                  "美国-商务签证材料清单",
                  style: TextStyle(
                      fontSize: 14.sp,
                      color: Colors.red,
                      fontWeight: FontWeight.bold),
                ),
              )
            ],
          ),
        ),
      ],
    );
  }

  ///调用浏览器的下载功能下载文件
  downLoadFile(url) {
    AnchorElement anchorElement = AnchorElement(href: url);
    anchorElement.download = "资料";
    anchorElement.click();
  }
}