ios - iOS 中的电子邮件验证 - 正则表达式不起作用 - 代码包含有效电子邮件地址数组

Question

我有一系列据称有效的电子邮件，我正在测试我的正则表达式语句以检查我的正则表达式方法是否有效。根据此列表，它们应该全部返回，但有些则不然，我将如何对我的代码进行防弹保护，使其相应地工作:

+(BOOL)isValidEmail: (NSString *)emailString{
    BOOL stricterFilter = YES;
    NSString *stricterFilterString = @"[A-Z0-9a-z\\._%+-]+@([A-Za-z0-9-]+\\.)+[A-Za-z]{2,4}";
    NSString *laxString = @".+@([A-Za-z0-9]+\\.)+[A-Za-z]{2}[A-Za-z]*";
    NSString *emailRegex = stricterFilter ? stricterFilterString : laxString;
    NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];
    return [emailTest evaluateWithObject:emailString];

}

有效电子邮件的数组是:

 NSArray *array = [NSArray arrayWithObjects:@"johndoe@gmail.com",

                  @"email@example.com",
                  @"firstname.lastname@example.com",
                  @"email@subdomain.example.com",
                  @"firstname+lastname@example.com",
                  @"email@123.123.123.123",
                  @"email@[123.123.123.123]",
                  @"“email”@example.com",
                  @"1234567890@example.com",
                  @"email@example-one.com",
                  @"_______@example.com",
                  @"email@example.name",
                  @"email@example.museum",
                  @"email@example.co.jp",
                  @"firstname-lastname@example.com",
                  nil];

然后我执行这个循环:

for (NSString * email in array) {
    NSLog(@"Email: %@ is valid %@",email,[NSString isValidEmail:email] ? @"YES" : @"NO");
    ;
}

哪些日志:

 Email: johndoe@gmail.com is valid YES
 Email: email@example.com is valid YES
 Email: firstname.lastname@example.com is valid YES
 Email: email@subdomain.example.com is valid YES
 Email: firstname+lastname@example.com is valid YES
 Email: email@123.123.123.123 is valid NO
 Email: email@[123.123.123.123] is valid NO
 Email: /“email/”@example.com is valid NO
 Email: 1234567890@example.com is valid YES
 Email: email@example-one.com is valid YES
 Email: _______@example.com is valid YES
 Email: email@example.name is valid YES
 Email: email@example.museum is valid NO
 Email: email@example.co.jp is valid YES
 Email: firstname-lastname@example.com is valid YES

根据这个 Valid email addresses 它们应该都是有效的

Answer 1

试试这个:

[\da-zA-Z_+\\.\-\/(“|”)]+@(([a-zA-Z\-]+(\\.[a-zA-Z]+){1,2})|(\[?[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\]?))