How to draw a UIView circle that acts like a UICollisionBehavior?

In my application, I am currently drawing the main view, and then I am trying to round it in corners using CAShapeLayer, but UICollisionBehavior still reacts like a square that is drawn.

Here is an example of my code

  UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:self.bounds
                                           byRoundingCorners:UIRectCornerAllCorners
                                                 cornerRadii:radiiSize];

// Mask the container view’s layer to round the corners.
CAShapeLayer *cornerMaskLayer = [CAShapeLayer layer];
[cornerMaskLayer setPath:path.CGPath];
self.containerView.layer.mask = cornerMaskLayer;
self.containerView.layer.allowsEdgeAntialiasing = YES;