iOS bug in EventSystem.IsPointerOverGameObject?

Hi,

I’ve encountered what looks like a bug in EventSystem.IsPointerOverGameObject on iOS. I’ve upgraded my unity editor several times over the last few weeks, and code that used to work is no longer behaving as I expect. I’ve reproduced the issue in unity versions 2018.3.7f1, 2018.3.8f1, and 2019.1.0b4, but I didn’t see the issue in 2018.3.0b5 or older.

The problem is that there appears to be a delay of several frames in IsPointerOverGameObject. When I touch a UI button, for 2 frames IsPointerOverGameObject reports false, then it starts reporting true. To verify that I’m not moving my finger to change the result, I’m Debug.Log’ing the Input.mousePosition every frame, and it reports the same coordinates.

I’ve also tried using the GraphicRaycaster attached to my canvas to manually raycast at the Input.mousePosition, to look for UI elements. The results of this raycast match IsPointerOverGameObject: the raycast returns no hits for 2 frames, then starts finding all my UI elements.

I’ve reproduced this behavior on an iPhone XS, but I don’t see it on android or in the editor.

Is anyone else seeing this behavior, or are there other workarounds I should try? For now my workaround is to queue up my input, and not process mouse/touch events until 2 frames AFTER they actually occur, which obviously has a negative impact on the user experience.

 

There is definately an issue because with latest verson I am also seeing report of "false" on iOS touch with this function ! Guess we need to open an issue tracker report - or did you do already?

BTW also using a XS Max in order to reproduce it - but working fine on Android/Editor.

 

same here with 2019.3.0b10

 

The problem still exists even with 2019.3.0f1!

 

And with 2019.2.17!
OMG, are you there???

 

And with 2019.3.0f6!
HEY! ANYONE???

 

https://forum.unity.com/threads/how....1580304648-131955583.1573041885#post-1820891