iOS Development : writing byteArray ( Int8 ) to a file and retrieve the byteArray ( Int8 ) from the file

Hello developers,

I am trying the write byteArray [Int8] in a file in document folder and upload it to my server.

On recieving the file on server i want to read the file and convert it back to original byteArray [Int8].

 

Note : My Server is on java platform, so i want to convert the content of byte in byte[].

 

I am new to iOS development.

How can i achieve this ?

 

So far, I have successfully created the file and have written the data in Data( ) format. But now, how can i convert it to ByteArray again on my server ?

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