Unity UI Accurate Constant Physical Size canvas scaler for iphone SE

I am creating a mobile game where I want to have a ui that is scaled based on physical size. For this I am using a canvas scaler that is set to "constant physical size" using Physical Units : Points, Fallback Screen DPI : 96 Default Sprite DPI 96 and reference Pixels per unit : 100



Then to ensure the UI is correctly organized for the IPhone SE screen I created a game view "Iphone5 wide" with resolution 568x320 per the documentation at https://www.paintcodeapp.com/news/ultimate-guide-to-iphone-resolutions

However the UI scale shown in the editor is different that what gets rendered on an iphone 5
Here is the view in the editor :


On the actual device :


Interestingly the buttons are the same physical size between the editor and device but the editor view is simply the wrong size. I'm assuming this is due to a difference in DPI between my monitor and the device.

I must be using the canvas scaler incorrectly. I want to have the ui components to maintain the same physical size regardless of the devices DPI or resolution.

 

It appears this is a known issue and other have created solutions. Linking one solution : https://forum.unity.com/threads/ple...upposed-to-use-constant-physical-size.281161/

 

Thanks ross -- it's really surprising that "constant physical size" doesn't work as expected... I thought I was going crazy until I saw your post here.

 

Its annoying. 4 years later... and we are in the same situation.

That's true. Constant physical size is not behaving as expected.

It would be perfect to be able to design touchable interfaces and ensure a minimum space for fingers but, I abandoned this idea some time ago expecting this to be fixed in some moment.

Maybe a solution is to have a minimum and maximum limits for scale like this feature proposal.

https://feedback.unity3d.com/sugges...stant-physical-size-mode-of-the-canvas-scaler

Please vote for it or propose another solution if you feel like.