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Error when reading CallbackContext

Discussion in 'Input System' started by quint_unity, Oct 25, 2020.

  1. quint_unity

    quint_unity

    Joined:
    Oct 11, 2020
    Posts:
    13
    I'm receiving an error when utilizing the code below.

    Code (CSharp):
    1.     public void OnMouseScroll(InputAction.CallbackContext context)
    2.     {
    3.         Debug.Log(context.ReadValue<Vector2>());
    4.     }
    5.  
    MissingMember.PNG

    inputsystem.PNG Actions.PNG SendMessage.PNG
     
    quint_unity, Oct 25, 2020
    #1

  2. Rene-Damm

    Rene-Damm

    Unity Technologies

    Joined:
    Sep 15, 2012
    Posts:
    1,779
    Messages cannot receive InputAction.CallbackContext arguments. Events must be used to receive the full callback context. Messages either need to be without an argument (for buttons) or take an InputValue argument.
     
    Rene-Damm, Oct 26, 2020
    #2
    solidfrog likes this.

  3. illegallyblonde

    illegallyblonde

    Joined:
    Aug 22, 2015
    Posts:
    6
    Unity should provide a clearer error message for this. I saw quite a few threads asking the same question, and it wastes developer time.
     
    illegallyblonde, Mar 28, 2021
    #3
    Radicals270, Vaupell, trombonaut and 2 others like this.

  4. BitBenderGames

    BitBenderGames

    Joined:
    Aug 9, 2015
    Posts:
    71
    Seconded. Haven't found a single tutorial that explains this aspect properly
     
    BitBenderGames, Feb 12, 2023
    #4
    Radicals270 and Vaupell like this.