如何在Objective-C中屏蔽电子邮件地址

Question

如何在Objective-C中屏蔽电子邮件地址字符串？

我想按以下步骤屏蔽电子邮件

mugunth@gmail.com转换为m ***** h@gmail.com

Answer 1

找到@的范围，并通过从范围位置减小2来创建新范围。创建一个包含*个字符的新字符串，并以新的范围长度重复。现在，替换范围内的字符。

NSArray *emails = @[@"mugunth@gmail.com",@"mugunthgmail.com",@"m@gmail.com"];
NSString *emailRegex = @"[A-Z0-9a-z._%+-]{2,}+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";
NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];
for (NSString *email in emails) {
    if ([emailTest evaluateWithObject:email]) {
        NSRange range = [email rangeOfString:@"@"];
        NSRange newRange = NSMakeRange(1, range.location-2);
        NSString *replace = [@"" stringByPaddingToLength:newRange.length withString:@"*" startingAtIndex:0];
        NSString * maskedEmail = [email stringByReplacingCharactersInRange:newRange withString:replace];
        NSLog(@"%@",maskedEmail);//m*****h@gmail.com
    } else {
        NSLog(@"Invalid Email Address");
    }
}

  

m ***** h@gmail.com

     

无效的电子邮件地址

     

无效的电子邮件地址