将NSData转换为字节数组 [英] Convert NSData to byte array

问题描述

我想将NSData转换为字节数组，下面给出的是我使用的代码

I want to convert the NSData into byte array and given below is the code that i have used

    NSData *imageData = UIImagePNGRepresentation(recipeImage.image);
    NSUInteger len = [imageData length];
    Byte *byteData = (Byte*)malloc(len);
    memcpy(byteData, [imageData bytes], len);
    NSLog(@"%8s",byteData);

但是当我将byteData发布到下面给出的Web服务时，这给了我一个错误

But its giving me an error when i post the byteData to the webservice which is given below

服务器无法处理请求.--->参数无效."

"Server was unable to process request. ---> Parameter is not valid."

当我打印byteData时，这就是我在控制台中得到的

and when i print the byteData this is what i get in the console

âPNG

我尝试在文档中搜索NSData并找到了getBytes方法，但这也没有任何用处，我仍然遇到相同的错误.

I tried searching the docs for NSData and found the getBytes method but that too was not of any use i was still getting the same error.

能否让我从上面的代码中得知我在哪里或将数据转换为字节数组时犯了什么错误

Could you please let me know from the code above as in where i am wrong or what mistake i am making in converting the data into byte array

我尝试使用

[imageData getBytes:&byteData length:length];

这给我带来了严重的访问错误

Its giving me a bad access error

推荐答案

尝试一下

NSData *imageData = UIImagePNGRepresentation(recipeImage.image);  
NSUInteger len = [imageData length];
Byte *byteData= (Byte*)malloc(len);
[imageData  getBytes:byteData length:len];

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