gistfile1.txt

- (void)drawRect:(CGRect)rect {
  CGContextRef context = UIGraphicsGetCurrentContext();

  CGContextSaveGState(context);
  CGContextTranslateCTM(context, 0, rect.size.height);
  CGContextScaleCTM(context, 1, -1);
  // Do some drawing with CGContextDrawImage()
  CGContextRestoreGState(context);

  // Do some drawing with -[NSString(UIDrawing) drawInRect:]

  CGContextSaveGState(context);
  CGContextTranslateCTM(context, 0, rect.size.height);
  CGContextScaleCTM(context, 1, -1);
  // Do some drawing with CGContextDrawImage()
  CGContextRestoreGState(context);
}