title: drawRect Doesn't want to draw anything
body: <p>I have a ViewController on storyboard. I have used the interface builder to set a toolbar at the bottom of the screen. I have set the custom view to a view overrides drawRect. However, for the life of me, I cannot get <strong>anything</strong> ever to show up on screen called from that drawRect. drawRect itself is called just fine, but nothing shows up on screen.</p>
  
  <p>Also, I have this ViewController with a method that uses AVCaptureSession to toggle its background to a live view from camera input. I had suspected that this might have been the cause for error, but after removing all references of AVCaptureSession, I still cannot get this to work.</p>
  
  <p>Sorry for my writing and/or lack of logic, I don't have any sleep right now.</p>
  
  <p>Edit: Here is a small example of code that won't work. Every method inside gets called, but nothing is to show.</p>
  
  <pre><code>- (void)drawRect:(CGRect)rect {
      [super drawRect:rect];
  
      CGContextRef context = UIGraphicsGetCurrentContext();
      CGContextSetStrokeColorWithColor(context, [UIColor redColor].CGColor);
  
      // Draw them with a 2.0 stroke width so they are a bit more visible.
      CGContextSetLineWidth(context, 2.0);
  
      CGContextMoveToPoint(context, 0,0); //start at this point
  
      CGContextAddLineToPoint(context, 100, 100); //draw to this point
  
      // and now draw the Path!
      CGContextStrokePath(context);
  }
  </code></pre>