Ios – How to draw a custom UIView that is just a circle – iPhone app

iosipadiphoneuiview

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)

Best Answer

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];
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