Question

How would I go about drawing a custom UIView that is literally just a ball (a 2D circle)? Would I just override the drawRect method? And can someone show me the code for drawing a blue circle?

Also, would it be okay to change the frame of that view within the class itself? Or do I need to change the frame from a different class?

(just trying to set up a ball bouncing around)

Answer 1

You could use QuartzCore and do something this —

self.circleView = [[UIView alloc] initWithFrame:CGRectMake(10,20,100,100)];
self.circleView.alpha = 0.5;
self.circleView.layer.cornerRadius = 50;  // half the width/height
self.circleView.backgroundColor = [UIColor blueColor];