Search Issue Tracker

By Design



Found in


Issue ID




[Mobile] Inconsistent touch input between iOS and Andoid; stable touch but jumpy movement from stationary position on iOS



Reproduction steps:

1. Open the attached "Archive" project.
2. Take a smaller dpi device with a bigger screen(It is easier to notice a difference).
3. Build and run it for iOS or play the scene with Unity Remote.
4. Touch the screen and slowly start to move your finger.
- Sphere should jump a short distance between the first and second frame (GIF 12:07(left sphere)).
5. Continue to move and stop the finger a few more times.
- Issue doesn't repeat again until finger is lifted and touch is repeated.

- Reproduces on 20% to 50% of touches.

Reproduced with:
iPad Air 8.1.1,
iPhone 6+ 10.0,

Not reproducible with:
Samsung Galaxy S6 Edge
Samsung Galaxy S7

Comments (2)

  1. 928f273290df8222157b8dd0c925d0b3?d=mm


    Mar 05, 2017 17:09

    for anybody else having this problem - i solved it by ignoring the first update of touches moved. it produces very smooth touches moved.

  2. 928f273290df8222157b8dd0c925d0b3?d=mm


    Jan 13, 2017 15:09

    happens with touch on device or remote 5, whether using IDragHandler or input.gettouch.
    seems to be confined to device only as it doesn't happen when simulating drag using mouse and IDragHandler in editor

Add comment

Log in to post comment

All about bugs

View bugs we have successfully reproduced, and vote for the bugs you want to see fixed most urgently.