IPointerDownHandler on GameObject doesn't work ?

Hey,

I was trying to implement User click with IPointerDownHandler on my GameObject
so i tried this

Code (CSharp):

1. public class TilePoint : MonoBehaviour, IPointerDownHandler
2. {
3.         public void OnPointerDown(PointerEventData eventData)
4.         {
5.             Debug.Log("Down");
6.         }
7. }

But the Debug is never showing in the unity console... so is it only for UI object?

 

Hello,
I've got the same issue.
Unfortunately, I don't know how to resolve it.

 

I have the same problem ;/.

 

Yes, It's only for UI elements.

Use this instead.

http://docs.unity3d.com/ScriptReference/MonoBehaviour.OnMouseDown.html

 

my problem is that i doesn't have any collider too

i will stay with my Engine that verify if Input.MouseButton(0) is fired
and then check position to know which tile in my grid has been clicked!

i wanted my tile to be able to react by theirself but it seems it cannot :S

or does a collider enable = false will work?

 

I don't think this works. But you could try setting IsTrigger to true. That way it won't collide with other objects but probably still work for OnMouseDown

 

nice idea i will try it when i come back from work!

 

I have did everything as in the tut but it still isn't working :<

 

You need a bunch of things in place for the interfaces to work. Here is the list:

• You need a GameObject in the scene with an EventSystem attached. This is created automatically when you create a Canvas, but you can also create one manually.
• You need a PhysicsRaycaster attached to the appropriate camera.
• You need a Collider attached to the GameObject
• Your script implementing the interface must be attached to the GameObject.

Do all of this and the EventSystem works like magic. Miss any of the steps and the whole thing won't work.

I've been thinking of doing a video just about the EventSystem. Let me know if this would be useful. I don't think there is one in the learn section.

 

i did everthing with your list.

I added the following items

• EventSystem
• PhysicsRaycaster to my camera
• GameObject with script and collider

it still doesn't work ;/

My Project Unity 5
http://www.speedyshare.com/maFqn/CodeTest.rar -141KB

 

Just so you know, you're not crazy. I decided to investigate the interfaces for handling input, and I get absolutely no response from any gameobjects implementing these interfaces.

Obviously they must work for people, they wouldn't have shipped otherwise, but apparently there's a trick to using them that isn't obvious. It's not as simple as implementing this interface on a script and attaching that script to an object.

Does the script have to descend from something else in particular? Can it be attached to arbitrary GameObject instances? Does it work on Instantiated GameObject instances? Do they have to be in the scene hierarchy right from the start?

 

Is this still the way to do it in 2017 version of Unity? I have tried all this, but it don't work?

 

Yes, all of those steps are still the same to do it.
This post is old. Please post a thread with your issue, showing your script and describing your issue.

 

- Add EventSystem to scene.
- Add Even Trigger to Gameobject
- Add code to GameObject
+
void IPointerUpHandler.OnPointerUp(PointerEventData eventData)
{
Debug.Log("OnPointerUp")
}
* Note: Your gameobject must have Box Collider
- Add Physics Raycatser to Main Camera

Good Luck!

 

For people who were stuck with this problem like me in the future, the problem was that I had deleted my EventSystem gameobject that the canvas creates and which is needed.
It should be a root game object with the components EventSystem and StandAloneInputModule

Recreating that, fixed the problem for me

 

Another pro tip:

1. Each canvas needs a GraphicsRaycaster. Including sub-canvases

 

If you develop in 2D heres another "gotcha"

I spent an hour trying to figure out why OnPointerDown would not fire on one of my gameobjects. Well turns out that gameobjects z-index was behind(?), outside of reach might be a better word, of my camera, Im guessing that causes no raycast hit.

So make sure whatever gameobject you try to implement the handler interfaces on is in the cameras view (switching from 2D mode to 3D mode visualizes the problem)

 

I had a problem with this. I had a blind spot where clicking did not lead to event, but outside of that area clicks went through.

Turned out I had a blank TextMeshPro object for displaying errors — and it had RaycastTarget on. So it intercepted all clicks.

Just had to turn RaycastTarget on any possibly blocking objects.

Does not require:
• Graphics raycaster, physics raycaster on camera
• Collider

Does require:
• A dummy object with EventSystem attached
• A script inheriting MonoBehaviour and implementing IPointerDownHandler
• Raycast target on clickable image
• No other objects covering it, or they have Raycast target disabled.

 

Thank you man! Maybe a noob thing but your reply saved me a couple of more hours, I'm sure! Thanks a lot<3

 

Works perfectly

 

I found the solution, you must put a physics raycaster component on the main cam, to work the raycast on a 3d object.

 

I found the solution, you must put a physics raycaster component on the main cam, to work the raycast on a 3d object.