UserInputService.TouchPan does not register multiple touches

Bug Reports Engine Bugs
#1

UserInputService.TouchPan is described on the dev hub as being able to support multiple touches along with other information about the pan action.

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However in practice the touchPositions array only ever has 1 touch position when multiple fingers are touching the screen.

Repro:

  1. play the repro place (link below) on a mobile device
  2. touch the screen with multiple fingers
  3. observe the debug text and touch position debug guis only displaying 1 touch

I can repro this behavior 10/10 times. I’m testing on a Pixel 3XL running android 10 (QP1A.190711.019) on the Roblox app version 2.398.332127

repro place (uncopylocked): .TouchPan bug repro place - Roblox
repro place source: -- found in the repro place under StarterGui.ScreenGui.LocalScript-- https://w - Pastebin.com
TouchPan doc page: UserInputService.TouchPan

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#2

thanks for the report. I believe this currently works on iOS, but not Android. We will look into this

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#4

This is still an issue on android, or has started again if it was ever fixed. touchPositions only ever has one entry.

#5

I would like to point out that this issue is still recurring and it needs to be fixed for developers to be able to make proper mobile functionality for their games. I have personally been frustrated trying to figure out why it was working on my iPad while testing but not on an Android device, only to realize that it is a bug with the engine which has not been fixed yet.

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#6

As a workaround you can manually track fingers by listening to .InputBegan and untrack them with .InputEnded. The Input object passed in both of those event will be consistent per finger.

I made a library for handling this a while ago local userInput = game:GetService("UserInputService")local players = game:GetS - Pastebin.com . It requires a signals class and I’ve linked one in the script that will work with it.

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