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Duplicate in 2019.3



Found in



Issue ID




Unity Events that have arguments cannot be used anymore



Repro steps:

1. Add a "Slider" component to the scene.
2. Select it and check its "On Value Changed" event property.
3. See that it has no argument and no method that takes a float can be assigned to it.

This has been found in 2019.3.0b1. The problem is not present in 2019.1. 2019.2 has not been checked.

The problem seems to appear for all UnityEvents that take arguments. If it does, the argument does not appear in the inspector, any existing method on it will appear as "missing", and no new method with the right signature (e.g. expecting a float) can be assigned.

Note that this is not exclusive to uGUI. Any use of UnityEvent anywhere will exhibit the same problem.

Comments (5)

  1. 973227956e3d8eda18a3570d768711ba?d=mm


    Mar 19, 2020 12:28

    It is an informative article for us. It gives me a piece of proper information. I am also facing the same issue. You gave the details step by step information and It is easily understandable. Waiting for more informative updates. <a href=""></a>

  2. Eb4a73f7c6bc62a0c464f2f2185e6445?d=mm


    Nov 01, 2019 04:35

    Nice post. I learn something totally new and challenging on websites I stumbleupon every day. It's always useful to read through articles from other authors and practice something from other sites.

  3. 79e000d99860f4483addd97406a63dad?d=mm


    Aug 29, 2019 17:26

    Appreciate it for all your efforts that you have put in this. very interesting info -

  4. Bff613a6140cd47de675a7eb2896bd2e?d=mm


    Aug 29, 2019 17:19

    hanks for share with us keep moving..waiting for more updates -

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