如何在Flutter | Flutter中从字符串中获取语言代码

String languageTag = "en-US";
String getLanguageCode(String tag) {
  List<String> parts = tag.split('-');
  return parts[0];
}

void main() {
  String code = getLanguageCode(languageTag);
  print(code); // 输出: en
}

String getLanguageCode(String tag) {
  List<String> parts = tag.split('-');
  return parts.length > 0 ? parts[0] : '';
}

String getLanguageCode(String tag) {
  if (tag == null || tag.isEmpty) return '';
  List<String> parts = tag.split('-');
  return parts.length > 0 ? parts[0] : '';
}

String getLanguageCode(String tag) {
  if (tag == null || tag.isEmpty) return '';
  RegExp regex = RegExp(r'^([a-zA-Z]+)');
  Match match = regex.firstMatch(tag);
  return match != null ? match.group(1) : '';
}