macOS Anyway to add fonts to an iPhone program?

NSTextStorage
  setFont
    You have to pass an NSFont to this. This might complicate things because you have a CGFontRef, but hopefully it's easy to get the NSFont pretty similarly.
  setCharacters
    Pass an NSArray of characters. I would just pass in 0-127 or 0-256

NSLayoutManager
  glyphIndexForCharacterAtIndex
    You should be able to pass in a character index (which would just be the ascii values or unicode code points) and get the glyph back. it will be a NSUInteger, but you should be able to cast that to a CGGlyph. The CGGlyph is an unsigned short, not an integer, but I think the cast should do it.

void GetGlyphsForUniChars( const UtilStr& inTypefaceName, const UniChar inChars[], int inNumChars, CGGlyph outGlyphs[] ) {

	// A negative length denotes that inChars[] is NUL terminated.
	if ( inNumChars < 0 ) {
		inNumChars = 0;
		while ( inChars && inChars[ inNumChars ] )
			inNumChars++;
	}

	if ( inNumChars <= 0 )
		return;

	NSString* srcChars = [ NSString stringWithCharacters: inChars length: inNumChars ];
	NSString* fontName = [ NSString stringWithUTF8String: inTypefaceName.CStr() ];
	NSFont* font = [ NSFont fontWithName:fontName size:0 ];

	NSTextStorage* textStorage = [[ NSTextStorage alloc ] initWithString: srcChars ];
	
	if ( font ) {
		[ textStorage setFont: font ];
	} else {
		ss_break();
	}

	NSLayoutManager* layoutMgr = [[ NSLayoutManager alloc ] init ];
	[ textStorage addLayoutManager: layoutMgr ];


	// Unicode strings can be arbitraily complex and all kinds of reordering and glyph combination can occur (including consolidation to fewer glyphs).
	// We assume below that one unicode char maps to one glyph and that they occur in order.  Since this assuption doesn't hold for asian languages, 
	//    we must be careful.  Fortunately, for typical western fonts and the text we intend to convert, this is good enough.
	SInt32 numGlyphs = [ layoutMgr numberOfGlyphs ];
	ss_assert( (int) numGlyphs == inNumChars );

	NSGlyph* nsglyphs = (NSGlyph*) ss_malloc( sizeof( NSGlyph ) * numGlyphs );

	NSRange range = { 0, numGlyphs };
	[ layoutMgr getGlyphsInRange : range glyphs: nsglyphs characterIndexes:NULL glyphInscriptions:NULL elasticBits:NULL ];

 	{
		int i;

		for ( i = 0; i < numGlyphs; i++ ) {
			if ( nsglyphs[ i ] < 0xFFFF ) {
				outGlyphs[ i ] = (CGGlyph) nsglyphs[ i ];
			} else {
				outGlyphs[ i ] = 0;
			}
		}

		for ( ; i < inNumChars; i++ ) {
			outGlyphs[ i ] = 0;
		}
	}

	ss_free( nsglyphs );
	nsglyphs = NULL;

	[ layoutMgr release ];
	[ textStorage release ];
}