• 11位手机号

+ (BOOL)isValidPhone:(NSString *)originalStr
{
    NSString *phoneRegex = @"^1([3456789])\\d{9}";
    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", phoneRegex];
    return [pred evaluateWithObject:originalStr];
}

• 邮箱

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

• 身份证号（目前是15位和18位）

+ (BOOL)isValidIDCardNum:(NSString *)originalStr
{
    BOOL isMatch = NO;
    
    if ([self isBlankString:originalStr])
    {
        return isMatch;
    }
    
    if(originalStr.length!=15&&originalStr.length!=18)
    {
        return isMatch;
    }
    
    NSString *cardNo = [NSString stringWithFormat:@"%@",originalStr];
    
    NSString *idCodeRegex = @"((1[1-5])|(2[1-3])|(3[1-7])|(4[1-6])| (5[0-4])|(6[1-5])|71|(8[12])|91)";
    NSPredicate *idCodeTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", idCodeRegex];
    
    if (![idCodeTest evaluateWithObject:[cardNo substringToIndex:2]])
    {
        return isMatch;
    }
    
    NSArray *strJiaoYan = [NSArray arrayWithObjects:@"1", @"0", @"X", @"9", @"8", @"7", @"6", @"5",@"4", @"3", @"2", nil];
    NSArray *arr = [NSArray arrayWithObjects:@"7", @"9", @"10", @"5", @"8", @"4", @"2", @"1", @"6", @"3", @"7", @"9", @"10", @"5", @"8", @"4", @"2", nil];
    
    if (cardNo.length == 15)
    {
        NSString *ereg = @"";
        
        if (([[cardNo substringWithRange:NSMakeRange(6, 2)]intValue]+1900)%4 == 0
            || (([[cardNo substringWithRange:NSMakeRange(6, 2)]intValue]+1900)%100 == 0
                && ([[cardNo substringWithRange:NSMakeRange(6, 2)]intValue]+1900)%4 == 0))
        {
            // 测试出生日期的合法性
            ereg = @"[1-9][0-9]{5}[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))[0-9]{3}";
        }
        else
        {
            // 测试出生日期的合法性
            ereg = @"[1-9][0-9]{5}[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}";
        }
        
        
        NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",ereg];
        isMatch = [pred evaluateWithObject:cardNo];
        if (isMatch == NO)
        {
            return isMatch;
        }
        isMatch = NO;
        cardNo = [NSString stringWithFormat:@"%@19%@",[cardNo substringToIndex:6],[cardNo substringWithRange:NSMakeRange(6, 9)]];
        
        int intTemp = 0;
        
        for (int i = 0; i<17; i++)
        {
            intTemp = intTemp + ([[cardNo substringWithRange:NSMakeRange(i, 1)]intValue] * [[arr objectAtIndex:i]intValue]);
        }
        
        intTemp = intTemp % 11;
        cardNo = [NSString stringWithFormat:@"%@%@",cardNo,[strJiaoYan objectAtIndex:intTemp]];
    }
    if (cardNo.length == 18)
    {
        NSString *ereg1 = @"";
        if (([[cardNo substringWithRange:NSMakeRange(6, 4)]intValue])%4 == 0
            || (([[cardNo substringWithRange:NSMakeRange(6, 4)]intValue])%100 == 0
                && ([[cardNo substringWithRange:NSMakeRange(6, 4)]intValue])%4 == 0))
        {
            // 闰年出生日期的合法性正则表达式
            ereg1 = @"[1-9][0-9]{5}(19|20)[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))[0-9]{3}[0-9Xx]";
        }
        else
        {
            // 平年出生日期的合法性正则表达式
            ereg1 = @"[1-9][0-9]{5}(19|20)[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}[0-9Xx]";
        }
        NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",ereg1];
        isMatch = [pred evaluateWithObject:cardNo];
        if (isMatch == NO)
        {
            return isMatch;
        }
        isMatch = NO;
        
        int intTemp = 0;
        
        for (int i = 0; i<17; i++)
        {
            intTemp = intTemp + ([[cardNo substringWithRange:NSMakeRange(i, 1)]intValue] * [[arr objectAtIndex:i]intValue]);
        }
        
        intTemp = intTemp % 11;
        
        NSString *last = [strJiaoYan objectAtIndex:intTemp];// 判断校验位
        
        if (!([last compare:[cardNo substringWithRange:NSMakeRange(17, 1)] options:NSCaseInsensitiveSearch] == NSOrderedSame))
        {
            return isMatch;
        }
        
    }
    isMatch = YES;
    return isMatch;
}

• 汉字

+ (BOOL)isChinese:(NSString *)originalStr
{
    NSString *chineseRegex = @"(^[\u4e00-\u9fa5]+[·•]?[\u4e00-\u9fa5]+$)";
    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF matches %@", chineseRegex];
    return [pred evaluateWithObject:originalStr];
}

• 纯数字

+ (BOOL)isPureInt:(NSString*)originalStr
{
    NSScanner *scan = [NSScanner scannerWithString: originalStr];
    int val;
    return [scan scanInt:&val] && [scan isAtEnd];
}

• 空字符串

+ (BOOL)isBlankString:(NSString*)originalStr
{
    if([originalStr isKindOfClass:[NSNull class]])
    {
        return YES;
    }
    if([originalStr isEqual:[NSNull null]])
    {
        return YES;
    }
    if (originalStr == nil)
    {
        return YES;
    }
    if([originalStr isEqualToString:@""] || [originalStr isEqualToString:@"null"] || [originalStr isEqualToString:@"<null>"])
    {
        return YES;
    }
    if([originalStr stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]].length == 0)
    {
        return YES;
    }
    return NO;
}

• 是否包含特殊符号

+ (BOOL)hasIllegalChar:(NSString *)originalStr
{
   //此集合中写入不想在字符串中出现的字符，视情况更改
    NSCharacterSet *illegalCharStr = [NSCharacterSet characterSetWithCharactersInString:@"\\/:*?\"<|'%>&@#"];
    NSRange range = [originalStr rangeOfCharacterFromSet:illegalCharStr];
    return range.location < originalStr.length;
}