iphone开发 用正则判断邮箱、密码是否正确

1、判断用户名，在2－16位

-(BOOL)CheckInput:(NSString *)_text
{
    NSString *Regex = @"^\\w{2,16}{1}quot;;
    NSPredicate *emailTest = [NSPredicatepredicateWithFormat:@"SELF MATCHES %@", Regex];
    return [emailTest evaluateWithObject:_text];
}

2、判断手机号码，1开头的十一位数字

-(BOOL)CheckInput:(NSString *)_text
{
    NSString *Regex = @"1\\d{10}";
    NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", Regex];
    return [emailTest evaluateWithObject:_text];
}

3、判断邮箱

-(BOOL)CheckInput:(NSString *)_text
{
    NSString *Regex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";
    NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", Regex];
    return [emailTest evaluateWithObject:_text];
}

4、判断密码，6－16位

-(BOOL)CheckInput:(NSString *)_text
{
    NSString *Regex = @"\\w{6,16}";
    NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", Regex];
    return [emailTest evaluateWithObject:_text];
}

入门网址：http://deerchao.net/tutorials/regex/regex.htm