How to set RectTransform position relative to another RectTransform

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I have a map as a UI.Image, I what to place another UI.Image representing a treasure chest on top of the map (in a script obviously).

I added an “Aspect Ration Fitter” to my treasure image in “Fit In Parent” aspect mode
and made my map image the parent, this way I can make sure the treasure image size is always correct when the Map size changes by different screen resolutions.

My problem is with setting the treasure image position, if I set the Pivot or PosX, PosY this is always related to the entire canvas and does not remain in the right place when the map resizes …

Can anyone suggest a way to do it ?

1 Answer

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Say you want it to be Top Left corner. Set the image to Top Left along with the anchors and all.

Then you can determine the X and Y offset based on another transform.