iphone - Updating UIView subclass contents -

I try to update a UIView subclass to draw a personal pixel (rectangle) after calculation in the MandelBrowSet set I am here. / P>

I am using the following code, but I am getting a blank screen:

  // drawingview ... - (Zero) Direct: (CGRact) rect {CGContextRef reference = UIGFixGetCourtContacts (); CGContextSetRGBFillColor (Reference, R, G, B, 1); CGContextSetRGBStrokeColor (Reference, R, G, B, 1); CGRTact = CGRactMake (X, Y, 1,1); CGContextFillRect (reference, shape); } ... //viewController.m ... - (zero) viewDidoad {{drawingView setX: 10]; [DrawingView Set Wi: 10]; [DrawingView SetR: 0.0]; [DrawingView Set G: 0.0]; [DrawingView Set B: 0.0]; [Super viewedload]; [Drawing view setnaides display]; }  

Once I understand how to display a pixel, I would like to know how to add another pixel to know how to update the view. To change all the variables once, how do I keep the current view, but how to add another pixel?

Thank you, Brett

  ccctntxmovepoint (reference, exclord, wichord) ; CGContextAddLineToPoint (reference, xcoord, ycoord); CGContextStrokePath (reference);