Change camera fov on canvas button pressed

Questions & Answers
1

Hello there,

I’m trying to change camera’s fov when a UI canvas button is pressed, and reset the fov to a default value when released.
The code works with keyboard inputs, but not with the UI button.
So far I tried to attach the script’s funtion to button’s “onClick” function. It doesn’t work.
I also tried to reference the button in the script, and add a listener to it. Not working.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class ButtonInputs : MonoBehaviour 
{
    Camera cam;
    
    public float defaultFov;
    public float zoomedFov;
    public float altZoomedFov;
    public Button leftButton;
    public Button rightButton;
    void Start ()
    {
        cam = Camera.main;
        Button btn1 = leftButton.GetComponent<Button>();
        Button btn2 = rightButton.GetComponent<Button>();
        cam.fieldOfView = defaultFov;
        btn1.onClick.AddListener(ZoomA);
        btn2.onClick.AddListener(ZoomB);
    }

    void LateUpdate()
    {
        cam.fieldOfView = defaultFov;
        if(Input.GetKey(KeyCode.Z))
        {
           ZoomA();
        }
        else if(Input.GetKey(KeyCode.X))
        {
            ZoomB();
        }
    }

    public void ZoomA()
    {
        cam.fieldOfView = zoomedFov;
    }

    public void ZoomB()
    {
         cam.fieldOfView = altZoomedFov;
    }
}

Any idea on how to get the camera to react at UI buttons?
Thank you in advance

2

Hi - @Paramotion

This is just a matter of reading your code. Think about it - In your late update you are setting your field of view always to default as first thing - what could happen?

Just remove the line and you’ll be fine.

3

Instead of button you need generic event trigger with two even hadlers for on pointer down and on pointer up. The button have just click event handler.