is there any tutorial for ui button for character to interact with npc or object?

Question

im making a android 2d rpg. i cant seem to call the button as a key all the tutorial i see all use Input.GetKeyDown(KeyCode.Space) i want to use the button to call it, are their any tutorial for these?

Answer 1

PSEUDO-CODE (not actual code)

  // To be attached to player

 Interactable interactable; // Script to attach to other object
 
 OnTriggerEnter(Collider other)
     Interactable i = other.GetComponent<Interactable>();
     if( i != null )
         interactable = i:
 
 OnTriggerExit(Collider other)
     Interactable i = other.GetComponent<Interactable>();
     if( i != null && interactable == i)
         interactable = null:
 
 public void Interact() // to be called by button
     if(interactable != null)
        interactable.Interact();

 public interface Interactable : MonoBevahiour
 {
     void Interact();
 }

 public class YourObject : MonoBevahiour, Interactable 
 {
     public void Interact()
     {
         Debug.Log("Someone interacted with me");
     }
 }

 public class YourOtherObject : MonoBevahiour, Interactable 
 {
     public void Interact()
     {
         Debug.Log("Hello world");
     }
 }

is there any tutorial for ui button for character to interact with npc or object?

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