string - 如何将中间字符串替换为 Dart 中的其他字符？

Question

final email = '[e-mail]';
final phoneNumber = '0123456789';
 

此电子邮件字符串转换为此模式，如
Fox Example

电子邮件 -> ab****[e-mail] 电话号码
-> (012)3****89

请帮助使用RegExp，欢迎使用 0ther 技术。

标签： stringflutterdart

Answer 1

您可以使用replaceRange方法

final email = '[e-mail]';
final phoneNumber = '0123456789';

final hiderPlaceholder = "****";

final censuredEmail = email.replaceRange(2, email.indexOf("@")-1, hiderPlaceholder);
  
final censuredPhoneNumber = "(" + phoneNumber.substring(0, 3) + ")" + phoneNumber.substring(3).replaceRange(1, phoneNumber.substring(3).length-2, hiderPlaceholder);
  
print (censuredEmail);
print (censuredPhoneNumber);

或者你可以选择常青子串

final email = '[e-mail]';
final phoneNumber = '0123456789';

final hiderPlaceholder = "****";

final censuredEmail = email.substring(0, 2) + hiderPlaceholder + email.substring(email.indexOf("@")-1);

final censuredPhoneNumber = "(" + phoneNumber.substring(0, 3) + ")" + phoneNumber.substring(3, 4) + hiderPlaceholder + phoneNumber.substring(phoneNumber.length-2);

print (censuredEmail);
print (censuredPhoneNumber);

Ps 显然，添加您想要的所有控件，例如电子邮件/电话号码的长度