基础算法对比

上传图片需要切片上传（一张图片分为n个小块上传）每张图片切后的分片数组 组成代码如下

//优秀代码
    NSMutableArray *imagePie = [NSMutableArray arrayWithCapacity:5];
    NSInteger length = imgData.length;
    int i = 0;
    while (i * sizeOfImgPie < length) {
        NSInteger location = i * sizeOfImgPie;
        NSInteger pie_len = MIN(sizeOfImgPie,length - location);
        NSData *pie = [imgData subdataWithRange:NSMakeRange(location, pie_len)];
        [imagePie addObject:pie];
        i++;
    }

//自己写的代码
   NSInteger p1Count = [p1ImgData length]/kImageUpload_imagePie_size;
    NSInteger lastDataLength = [p1ImgData length]%kImageUpload_imagePie_size;
    if (lastDataLength) {
        p1Count = p1Count + 1;
    }
    for (int i = 0; i < p1Count; i++) {
        int dataLength = kImageUpload_imagePie_size;
        if (i == p1Count - 1) {
            dataLength = lastDataLength;
        }   
        NSData *pieData = [p1ImgData subdataWithRange:NSMakeRange(i*kImageUpload_imagePie_size, dataLength)];
        if (pieData.length) {
            [p1ImgPieArr addObject:pieData];    
        }
    }

代码需要优化，需要思考