I am in a single view application, and I've set up the colliding behavior. I have two different arrays or groups of UIViews. I want members of the same group to collide with one another, but members of differing groups to pass through one another. How can I do this?
Swift Xcode Collisions between group members, but not groups
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If you simply have two arrays of views that you want to check collisions for, this should simply be a matter of testing all pairs between the two groups (or do you meant to find an optimized way of doing that?):
If you need to check collisions for a specific view that is part of the hierarchy, you could use the UIView tag as your group identifier and extend UIView to identify the collisions :
You can then check for collisions between one view (e.g. the one being moved) and the others using this function: