NSData转Byte数组分段上传

UIImage *image = [UIImage imageNamed:@"123"];
    NSData *data = UIImagePNGRepresentation(image);
    // 每次读取1024的长度
    NSInteger readLength = 1024;
    NSInteger count = data.length / readLength;
    
    NSMutableData *mutData = [NSMutableData data];
    char bytes[data.length];
    for (int i = 0; i < count; i++) {
        [data getBytes:bytes range:NSMakeRange(i * readLength, readLength)];
        NSData *newData = [NSData dataWithBytes:bytes length:readLength];
        [mutData appendData:newData];
    }
    // 最后剩余的部分
    NSInteger res = data.length % readLength;
    if (res > 0) {
        [data getBytes:bytes range:NSMakeRange(data.length - res, res)];
        NSData *newData = [NSData dataWithBytes:bytes length:res];
        [mutData appendData:newData];
    }
　　
　　NSLog(@"resulteData:%ld", mutData.length);

标签：res,上传,bytes,length,readLength,NSData,Byte,data
来源： https://www.cnblogs.com/dashengios/p/16511697.html