Convert nsdata to nsstring with no parentheses or spaces

Nsstring * strtest = @ "hello ";

Nsdata * datastring = [strtest datausingencoding: nsutf8stringencoding];

If nslog (@ "% @", datastring );

 

You will see the following in the console:

 

To remove the angle brackets and spaces at the beginning and end, we can add a category to nsdata.

// Nsdatatonsstring. h

@ Interface nsdata (tonsstring)

 

-(Nsstring *) converttonsstring;

 

@ End

 

// Nsdatatonsstring. m

@ Implementation nsdata (tonsstring)

 

-(Nsstring *) converttonsstring {

Nsmutablestring * strtemp = [nsmutablestring stringwithcapacity: [self length] * 2];

Const unsigned char * szbuffer = [self bytes];

For (nsinteger I = 0; I <[self length]; ++ I ){

[Strtemp appendformat: @ "% 02x", (unsigned long) szbuffer [I];

}

Return [[strtemp retain] autorelease];

}

 

@ End

 

The project contains the above two files,

If nslog (@ "data string: % @", [datastring converttonsstring]); you will see: