[iPhone] Building a wrapper around Quartz 2D. trouble with contexts

Question

I'm building myself a small ObjC wrapper around some of the basic Quartz 2D drawing functions such as
CGContextMoveToPoint(context, rect.origin.x, rect.size.height - 50);
and so on.
The problem I'm having is with contexts. My wrapper looks something like this:
- (void)moveToPoint:(CGPoint)point {
CGContextMoveToPoint(context, point.x, point.y);
"context" in this case is UIGraphicsGetCurrentContext(); which gets called in my wrapper's initializer. I have a feeling this is where the problem (my wrapper is not the same object where the drawRect: method is).
How do I get the proper context?

Answer 1

I've never actually done this, so there may very well be some hidden compositing gotcha preventing this from working as smoothly as one might hope, but generally speaking, the whole point of the subview is to delegate all drawing responsibility to it. If the parent wants to draw something around or behind one of its children then it should do so without concern for anyone else's behavior (though it will doubtlessly want to implement some form of hit testing in a case such as this to make sure everything lines up visually).