It turned out to be not so trivial to use a custom font. I experimented a lot, and finally reached this solution.
It requires 2 steps:
1. Load the ttf
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7 | NSString *fontPath = [[NSBundle mainBundle]
pathForResource:@"#{font_file_name}" ofType:@"ttf"];
CGDataProviderRef fontDataProvider =
CGDataProviderCreateWithFilename([fontPath UTF8String]);
ref = CGFontCreateWithDataProvider(fontDataProvider);
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2. Draw glyphs
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4 | CGContextSetFont(_context, ref);
CGContextSetFontSize(_context, 80);
CGGlyph i = 40;
CGContextShowGlyphsAtPoint(_context, x, y, &i, 1);
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It helpers to invert the transformation matrix before drawing, as Apple fucked up the view coordinates in UIKit.
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3 | CGRect viewBounds = self.bounds;
CGContextTranslateCTM(_context, 0, viewBounds.size.height);
CGContextScaleCTM(_context, 1, -1);
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