Question

I have some image data (jpeg) I want to send from my iPhone app to my webservice. In order to do this, I’m using the NSData from the image and converting it into a string which will be placed in my JSON.

Currently, I’m doing this:

    NSString *secondString = [[NSString alloc]  initWithBytes:[result bytes]
                                                    length:[result length] 
                                                  encoding:NSUTF8StringEncoding];

Where result is of type NSData. However, secondString appears to be null even though result length returns a real value (like 14189). I used this method since result is raw data and not null-terminated.

Am I doing something wrong? I’ve used this code in other areas and it seems to work fine (but those areas I’m currently using it involve text not image data).

TIA.

Answer 1

For binary data, better to encode it using Base64 encoding then decode it in you webservice. I use NSData+Base64 class downloaded from here, this reference was also taken from Stackoverflow, an answer made by @Ken (Thanks Ken!).