How to found the intersection of two CAShapelayer

Question

I am having more than one CAShapeLayer. While dragging two layers, I need to find whether it's intersecting are not.

But I tried in my way of calculating frame intersection and points intersection. But it's always returning frame as CGRectMake(0,0,0,0), I mean zero for all the layers frame as well the position too getting zero.

If any one knows give some idea.

Do you want to check whether the **layers** or in the **paths** in the layers intersect? — Nikolai Ruhe, Aug 07 '14 at 14:44
Calling `CGRectStandardize` is recommended practise if you are doing custom calculations on frames. It can happen that they have weird definitions. — Lev Landau, Aug 07 '14 at 14:44
Show your code and describe what exactly does not work for you. — Nikolai Ruhe, Aug 07 '14 at 14:45

score 0 · Answer 1 · edited May 23 '17 at 10:27

0

Try

if (CGRectIntersectsRect(layer1.frame, layer2.frame))
{
   /* Do something when the intersect.
}

I appreciate that you might want to know if the paths intersect, which is a more difficult calculation discussed here

edited May 23 '17 at 10:27

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answered Aug 07 '14 at 14:38

Lev Landau

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How to found the intersection of two CAShapelayer

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