Public variable not showing in inspector using new Input System

Question

Hi! I decided to have a go with the new input system and make a simple top down 2D movement script with it. The script worked fine using the old system but now that I have converted it to the new system I have an issue. The input system needs a reference to Input mappings but when I have a public (or private, serialized) variable the field will not show up in the inspector. Here is the code I have:

 public class PlayerMovement : MonoBehaviour
 {
 
     public float moveSpeed = 4f;
     public InputMaster controls;
 
     private Rigidbody2D rb;
 
     private void Awake()
     {
         rb = GetComponent<Rigidbody2D>();
 
         controls.PlayerMap.Movement.performed += ctx => MovePlayer(ctx.ReadValue<Vector2>());
     }
 
     private void OnEnable()
     {
         controls.Enable();
     }
 
     private void OnDisable()
     {
         controls.Disable();
     }
 
     private void MovePlayer(Vector2 direction)
     {
         rb.velocity = direction.normalized * moveSpeed;
 
         //TODO: Animate Sprite
     }
 }

I am getting no errors in the console and can't see anything wrong with my code. Thanks for the help!

Answer 1

I had implemented the input system wrong because I was following an outdated tutorial. Whoops!

For anyone wondering, here is the working code:

 using UnityEngine;
 using UnityEngine.InputSystem;
 
 public class PlayerMovement : MonoBehaviour, InputMaster.IPlayerMapActions
 {
 
     public float moveSpeed = 4f;
 
     public InputMaster controls;
 
     private Rigidbody2D rb;
 
     private void Awake()
     {
         rb = GetComponent<Rigidbody2D>();
     }
 
     public void OnEnable()
     {
         if (controls == null)
         {
             controls = new InputMaster();
             controls.PlayerMap.SetCallbacks(this);
         }
         controls.PlayerMap.Enable();
     }
 
     public void OnMovement(InputAction.CallbackContext context)
     {
         Vector2 direction = context.ReadValue<Vector2>();
 
         rb.velocity = direction.normalized * moveSpeed;
 
         //TODO: Animate Sprite
     }
 }

Answer 2

I spent way too long wondering what I was doing wrong before reading the comments on the brackeys tutorial.

video reference: https://www.youtube.com/watch?v=Pzd8NhcRzVo

comment by user cbox reads:

"TIP For those doing the tutorial more recently, you can no longer drag the file into the inspector as they changed the backend. You can just do controls = new InputMaster(); in awake to create a new instance of the object."

Essentially, IF your code looks like this:

using UnityEngine.InputSystem; using UnityEngine; public class ThirdPersonMovement : MonoBehaviour { public InputMaster controls; void Awake() { controls.Player.Movement.performed += _ => Move(); controls.Player.Shoot.performed += ctx => Shoot(); } void Move() { Debug.Log("Move"); } void Shoot() { Debug.Log("Shot"); } private void OnEnable() { controls.Enable(); } private void OnDisable() { controls.Disable(); } } Then you just need to add controls = new InputMaster(); in the awake function using UnityEngine.InputSystem; using UnityEngine; public class ThirdPersonMovement : MonoBehaviour { public InputMaster controls; void Awake() { // ADD NEW INSTANCE HERE--> controls = new InputMaster(); controls.Player.Movement.performed += _ => Move(); controls.Player.Shoot.performed += ctx => Shoot(); } void Move() { Debug.Log("Move"); } void Shoot() { Debug.Log("Shot"); } private void OnEnable() { controls.Enable(); } private void OnDisable() { controls.Disable(); } }

Public variable not showing in inspector using new Input System

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