C# - Error " does not implement interface member"

Question

Hey guys,

I'm getting an error in my code that I don't understand. Any ideas on how to fix this?

Assets/OnClick_Button_Canvas.cs(11,14): error CS0535: OnClick_Button_Canvas' > does not implement interface member > UnityEngine.EventSystems.IPointerClickHandler.OnPointerClick(UnityEngine.EventSystems.PointerEventData)'

using UnityEngine; using UnityEngine.Events; using UnityEngine.UI; using System.Collections; using TriviaQuizGame; using TriviaQuizGame.Types; using UnityEngine.EventSystems; using EasyWiFi.Core; using System;

 public class OnClick_Button_Canvas : MonoBehaviour, IPointerClickHandler
 {
     public Button buttonPrefab; //default button
 
     public TQGGameController tqgameController;
     private int index = 0;
     bool isPressed;
 
     public void OnPointerClick(PointerEventData data, ButtonControllerType button)
     {
         isPressed = button.BUTTON_STATE_IS_PRESSED;
 
         if (isPressed)
         {
             Debug.Log("Button Clicked");
             tqgameController.ChooseAnswer(index);
         }
         else
             Debug.Log("Button Released");
 
     }
 
 }

Answer 1

Answer by tanoshimi · May 08, 2016 at 05:11 PM

You've got the signature wrong for OnPointerClick. It should be

 OnPointerClick(PointerEventData eventData) { ... }

See http://docs.unity3d.com/ScriptReference/EventSystems.IPointerClickHandler.OnPointerClick.html

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Bonfire-Boy · May 08, 2016 at 07:47 PM 0

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Also note that the error message is giving you this information.

Answer 2

I have the same issue here in version 201837 too ! I was using a coroutine to pulse and drag an object, my error message being: "MyEventHandlers.cs(10,47): error CS0535: 'MyEventHandlers' does not implement interface member 'IPointerEnterHandler.OnPointerEnter(PointerEventData)'"

But if you check my snippet:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 //01 
 using UnityEngine.EventSystems;
 using UnityEngine.Events;
 using UnityEngine.UI;
 
 //02 add extra handlers
 public class MyEventHandlers : MonoBehaviour, IPointerEnterHandler, IDragHandler, IPointerExitHandler
 {
     //04 to make the object pulse, check if it is pulsing already
     private bool pulse = false;
     //04a and keep track of the time
     private float time = 0;
 
 
 
     //03 for IPointerEnterHandler, IDragHandler, IPointerExitHandler....
     public void OnDrag(PointerEventData eventData)
     {
         //
         //throw new NotImplementedException();
 
         //06b update the position of the object to the position to the mouse pointer in order to drag it with the mouse
         this.gameObject.transform.position = Input.mousePosition;
 
     }
     public void OnPointerEnter(PointerEventData eventData)
     {
         //
         //throw new NotImplementedException();
 
         //06 starts the coroutine
         pulse = true;
         StartCoroutine(PulseObject());
     }
     public void OnPointerExit (PointerEventData eventData)
     {
         //
         //throw new NotImplementedException();
 
         //06a set pulse
         pulse = false;
     }

I do implement IPointerEventHandler !

C# - Error " does not implement interface member"

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