注册页面的各种判断（正则表达式）

1.密码判断

至少包含数字、字母（区分大小写）、符号中的2种

NSString *regex = @"^(?![A-Z]+$)(?![a-z]+$)(?!\\d+$)(?![\\W_]+$)\\S+$";
            NSPredicate *predicate = [NSPredicate predicateWithFormat:@"self matches %@",regex];

 if ([predicate evaluateWithObject:textField.text] == NO) {

        UIAlertView *alerview =[ [UIAlertView alloc]initWithTitle:nil message:@"至少包含数字、字母（区分大小写）、符号中的2种。" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:nil, nil];

        [alerview show];
        [alerview release];

            }

2.手机号码的确认

  NSString *regex = @"^((13[0-9])|(147)|(15[^4,\\D])|(18[0,5-9]))\\d{8}$";
  NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];
  if (![textField.text isEqualToString:@""]&&[predicate evaluateWithObject:textField.text] == NO) {
          UIAlertView *alerview =[ [UIAlertView alloc]initWithTitle:nil message:@"请输入正确的手机号码" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:nil, nil];
          [alerview show];
          [alerview release];
            }

3.限制用户名特征应该是3 - 10之间
 ：

^.{3,10}$

4.电子邮件

[A-Z0-9a-z._%+-]{3,}+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}

5.密码必须包含字母数字字符

[A-Za-z0-9]{6,20}

6.电话号码必须在适当的格式(如。# # # - # # # - # # # #)

[0-9]{3}\\-[0-9]{3}\\-[0-9]{4}