title: How to change color of NSString in drawAtPoint
body: <p>I have this chunk of code here that draws a block with a one-character string on it:</p>
  
  <pre><code>CGContextDrawImage(context, CGRectMake([blok getLocation].x * xunit, [blok getLocation].y * yunit, 40, 40), [blok getImage].CGImage);
  [[blok getSymbol] drawAtPoint:CGPointMake([blok getLocation].x * xunit+15, [blok getLocation].y * yunit) withFont:[UIFont fontWithName:@"Helvetica" size:24]];
  </code></pre>
  
  <p>It's working fine, but I've been doing some layout changes, and now I need it so that the string drawn will be white. Using the methods for setting the fill color and the stroke color haven't done anything. Is there some other way to do this?</p>