尝试设置CSCPicker的defaultCountry属性与所选国家-这样你应该有预先选择的更改。

这个应该可以了

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

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

  @override
  State<MyWidget> createState() => _MyWidgetState();
}

class _MyWidgetState extends State<MyWidget> {
  CscCountry? initialCountry;

  @override
  void initState() {
    super.initState();
    initialCountry = CscCountry.Aland_Islands;
  }

  @override
  Widget build(BuildContext context) {
    return CSCPicker(
      defaultCountry: initialCountry,
      showCities: false,
      onCountryChanged: (country) {
        List<String> parts = country.split(" ");
        String code = parts.first;
        String name = parts.last;
        // your action => stateAction.updateCountry(name, code);
      },
      onStateChanged: (stateName) {
        if (stateName != null) {
          // your action => stateAction.updateCity(stateName);
        }
      },
      onCityChanged: (value) {},
    );
  }
}

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