Detecting a UI element is over another UI element

Questions & Answers
1

I’m essentially curious if there’s a way of doing this without adding a 2D collider to my UI elements, since this forces me to also put 2D rigidbodies on them. It just seems over kill. If it isn’t going to be a hit on memory or performance than I’ll go ahead and do it with ray casting and 2 colliders. If not …

I have an icon that’s controlled by the player and the camera is parented to it. The icon moves over a map and if the icon is over a particular regiond/point I want to interact with it. I’ve googled a little bit and pondered on it for a few days while working on other stuff but haven’t thought of a what I feel is a reasonable way of handling this.

I’m posting this in the forums as well, so if it’s too much discussion feel free to close this.

2

I’ve had some success here by adding a Canvas Group and manipulating the Blocks Raycast parameter.

You could also use multiple canvases and change the priority of the associated raycasters.

There is also probably a way to force the automatic system to do a raycast from a particular point. I just haven’t figured it out yet.