objective c - ASCII Code to NSData -

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i'm trying figure out esc/pos commands , need code "gs" (ascii code 29) put nsdata.

currently can put strings want print without problems using code:

nsstring *str = @"text want print"; nsdata *data = [str datausingencoding:nsasciistringencoding];

is there easy way using either c++ or obj-c?

c, c++, , objective-c let put arbitrary ascii codes string using so-called escape sequences.

escape sequence start either in \x followed 2 hex digits, or \0 followed 3 octal digits.

ascii gs 29 in decimal or 1d in hex, can put gs in nsdata this:

nsdata *data = [@"\x1d" datausingencoding:nsasciistringencoding];

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