character-system/Runtime/UI/FloatingValueUi.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Sirenix.OdinInspector;
using TMPro;

namespace KairoEngine.CharacterSystem
{
    public class FloatingValueUi : MonoBehaviour
    {
        public TextMeshProUGUI textMesh;
        public RectTransform rectTransform;
        public float lifetime = 1f;

        private Vector3 pos;
        private float counter = 0f;

        public void Setup(Vector3 position, string text, float lifetime = 0.7f)
        {
            textMesh.text = text;
            pos = new Vector3(position.x, position.y + 2.5f, position.z);
            this.lifetime = lifetime;
        }

        public void Update()
        {
            textMesh.enabled = true;
            if (pos != null && rectTransform != null)
            {
                pos.y += 0.5f * Time.deltaTime;
                Vector3 screenPos = Camera.main.WorldToScreenPoint(pos);
                rectTransform.position = screenPos;
            }
            counter += Time.deltaTime;
            if(counter > lifetime)
            {
                Destroy(gameObject);
            }
            float a = textMesh.color.a - (textMesh.color.a * lifetime) * Time.deltaTime;
            Color c = new Color(textMesh.color.r, textMesh.color.g, textMesh.color.b, a);
            textMesh.color = c;
        }
    }
}