Swift：如何判断myView与哪些UIView相交？

Question

I have an array of 16 boxViews, which are present in random locations on my superview. I am dragging myView which is a special subView. I need to be able to tell which boxView(s), myView is intersecting with, at any given time. How do I do achieve that?

Answer 1

Suppose you have boxViews that is an array of all the view in your super view. And all UIViews in boxViews have the same immediate super view. And that myView is among the views in boxViews .

let intersectedViews = boxViews.filter { $0 !== myView }
                               .filter { CGRectIntersection(myView.frame, $0.frame) }