IOS常用正则表达式判断

//校验密码
+(BOOL)checkPass:(NSString*)pass
{
    if(pass==nil)
    {
        return NO;
    }
    NSString *regex = @"^[A-Za-z0-9]+$";
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@ AND SELF.length > 5 AND SELF.length < 17", regex];
    return [predicate evaluateWithObject:pass];
}
//校验电话号码
+(BOOL)checkIsPhone:(NSString*)str
{
    NSString *regex = @"(13[0-9]|14[57]|15[0123456789]|18[023456789])\\d{8}";
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];
    return [predicate evaluateWithObject:str];
}
//校验是否是数字
+(BOOL)checkIsNumber:(NSString*)str
{
    if(str==nil)
    {
        return NO;
    }
    NSString *regex = @"^(([0-9]+\\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\\.[0-9]+)|([0-9]*[1-9][0-9]*))$";//@"^[0-9]+$";
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@ ", regex];
    return [predicate evaluateWithObject:str];
}

//身份证号
+ (BOOL)CheckIsIdentityCard: (NSString *)identityCard
{
    //判断是否为空
    if (identityCard==nil||identityCard.length <= 0) {
        return NO;
    }
    //判断是否是18位，末尾是否是x
    NSString *regex2 = @"^(\\d{14}|\\d{17})(\\d|[xX])$";
    NSPredicate *identityCardPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex2];
    if(![identityCardPredicate evaluateWithObject:identityCard]){
        return NO;
    }
    //判断生日是否合法
    NSRange range = NSMakeRange(6,8);
    NSString *datestr = [identityCard substringWithRange:range];
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat : @"yyyyMMdd"];
    if([formatter dateFromString:datestr]==nil){
        return NO;
    }
    //判断校验位
    if(identityCard.length==18)
    {
        NSArray *idCardWi= @[ @"7", @"9", @"10", @"5", @"8", @"4", @"2", @"1", @"6", @"3", @"7", @"9", @"10", @"5", @"8", @"4", @"2" ]; //将前17位加权因子保存在数组里
        NSArray * idCardY=@[ @"1", @"0", @"10", @"9", @"8", @"7", @"6", @"5", @"4", @"3", @"2" ]; //这是除以11后，可能产生的11位余数、验证码，也保存成数组
        int idCardWiSum=0; //用来保存前17位各自乖以加权因子后的总和
        for(int i=0;i<17;i++){
            idCardWiSum+=[[identityCard substringWithRange:NSMakeRange(i,1)] intValue]*[idCardWi[i] intValue];
        }
        int idCardMod=idCardWiSum%11;//计算出校验码所在数组的位置
        NSString *idCardLast=[identityCard substringWithRange:NSMakeRange(17,1)];//得到最后一位身份证号码
        //如果等于2，则说明校验码是10，身份证号码最后一位应该是X
        if(idCardMod==2){
            if([idCardLast isEqualToString:@"X"]||[idCardLast isEqualToString:@"x"]){
                return YES;
            }else{
                return NO;
            }
        }else{
            //用计算出的验证码与最后一位身份证号码匹配，如果一致，说明通过，否则是无效的身份证号码
            if([idCardLast intValue]==[idCardY[idCardMod] intValue]){
                return YES;
            }else{
                return NO;
            }
        }
    }
    return NO;
}