在开发中遇到一个需求，就是需要将阿拉伯数字转成汉字数字，或者将汉字数字转成阿拉伯数字

比如：123---> 一百二十三 321--->三百二十一
直接上代码
1，阿拉伯数字转成汉字数

- (NSString *)translation:(NSString *)arebic

{   NSString *str = arebic;
    NSArray *arabic_numerals = @[@"1",@"2",@"3",@"4",@"5",@"6",@"7",@"8",@"9",@"0"];
    NSArray *chinese_numerals = @[@"一",@"二",@"三",@"四",@"五",@"六",@"七",@"八",@"九",@"零"];
    NSArray *digits = @[@"个",@"十",@"百",@"千",@"万",@"十",@"百",@"千",@"亿",@"十",@"百",@"千",@"兆"];
    NSDictionary *dictionary = [NSDictionary dictionaryWithObjects:chinese_numerals forKeys:arabic_numerals];
    
    NSMutableArray *sums = [NSMutableArray array];
    for (int i = 0; i < str.length; i ++) {
        NSString *substr = [str substringWithRange:NSMakeRange(i, 1)];
        NSString *a = [dictionary objectForKey:substr];
        NSString *b = digits[str.length -i-1];
        NSString *sum = [a stringByAppendingString:b];
        if ([a isEqualToString:chinese_numerals[9]])
        {
            if([b isEqualToString:digits[4]] || [b isEqualToString:digits[8]])
            {
                sum = b;
                if ([[sums lastObject] isEqualToString:chinese_numerals[9]])
                {
                    [sums removeLastObject];
                }
            }else
            {
                sum = chinese_numerals[9];
            }
            
            if ([[sums lastObject] isEqualToString:sum])
            {
                continue;
            }
        }
        
        [sums addObject:sum];
    }
    
    NSString *sumStr = [sums  componentsJoinedByString:@""];
    NSString *chinese = [sumStr substringToIndex:sumStr.length-1];
//    NSLog(@"str %@",str);
    NSLog(@"%s  %@", __func__, chinese);
    return chinese;
}

2，汉字数字转成阿拉伯数字

- (NSString *)arabicNumberalsFromChineseNumberals:(NSString *)arabic{
    NSMutableDictionary * mdic =[[NSMutableDictionary alloc]init];
    
    [mdic setObject:[NSNumber numberWithInt:10000] forKey:@"万"];
    [mdic setObject:[NSNumber numberWithInt:1000] forKey:@"千"];
    [mdic setObject:[NSNumber numberWithInt:100] forKey:@"百"];
    [mdic setObject:[NSNumber numberWithInt:10] forKey:@"十"];
    
    [mdic setObject:[NSNumber numberWithInt:9] forKey:@"九"];
    [mdic setObject:[NSNumber numberWithInt:8] forKey:@"八"];
    [mdic setObject:[NSNumber numberWithInt:7] forKey:@"七"];
    [mdic setObject:[NSNumber numberWithInt:6] forKey:@"六"];
    [mdic setObject:[NSNumber numberWithInt:5] forKey:@"五"];
    [mdic setObject:[NSNumber numberWithInt:4] forKey:@"四"];
    [mdic setObject:[NSNumber numberWithInt:3] forKey:@"三"];
    [mdic setObject:[NSNumber numberWithInt:2] forKey:@"二"];
    [mdic setObject:[NSNumber numberWithInt:2] forKey:@"两"];
    [mdic setObject:[NSNumber numberWithInt:1] forKey:@"一"];
    [mdic setObject:[NSNumber numberWithInt:0] forKey:@"零"];
    
    //    NSLog(@"%@",mdic);
    
    BOOL flag=YES;//yes表示正数，no表示负数
    NSString * s=[arabic substringWithRange:NSMakeRange(0, 1)];
    if([s isEqualToString:@"负"]){
        flag=NO;
    }
    int i=0;
    if(!flag){
        i=1;
    }
    int sum=0;//和
    int num[20];//保存单个汉字信息数组
    for(int i=0;i<20;i++){//将其全部赋值为0
        num[i]=0;
    }
    int k=0;//用来记录数据的个数
    
    //如果是负数，正常的数据从第二个汉字开始，否则从第一个开始
    for(;i<[arabic length];i++){
        NSString * key=[arabic substringWithRange:NSMakeRange(i, 1)];
        int tmp=[[mdic valueForKey:key] intValue];
        num[k++]=tmp;
    }
    //将获得的所有数据进行拼装
    for(int i=0;i<k;i++){
        if(num[i]<10&&num[i+1]>=10){
            sum+=num[i]*num[i+1];
            i++;
        }else{
            sum+=num[i];
        }
    }
    NSMutableString * result=[[NSMutableString alloc]init];;
    if(flag){//如果正数
        NSLog(@"%d",sum);
        result=[NSMutableString stringWithFormat:@"%d",sum];
    }else{//如果负数
        NSLog(@"-%d",sum);
        result=[NSMutableString stringWithFormat:@"-%d",sum];
    }
    
    
    NSLog(@"%s  %@", __func__, result);
    return result;
}

测试用例

    NSString *chinese = [self translation:@"456"];
    NSLog(@"%@",chinese);
    
    NSString *num = [self arabicNumberalsFromChineseNumberals:@"一百五十一"];
    NSLog(@"%@", num);