CGRect Intersects Rect better alternative

Question

I'm trying to want to write an method whenever two UIImageViews intersect. The only way I know how to do it is CGRectIntersectsRect. But that only works with rectangles, but my images are circles. Isn't there a better alternative? Thank you!

Answer 1

You can do something like this:

CGPoint a = imageViewA.center;
CGPoint b = imageViewB.center;
CGFloat distance = sqrt(pow((b.x - a.x),2) + pow((b.y - a.y),2));

if(distance < (imageViewA.bounds.size.width/2.0 + imageViewB.bounds.size.width/2.0)){
    //images are touching.
}