Scriptum/Assets/Scripts/LevelBar.cs

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

public class LevelBar : MonoBehaviour
{
    public Slider slider;
    public float maxExp;
    public float exp;

    public void SetStartExp(float exp)
    {
        maxExp = PlayerPrefs.GetFloat("maxExp");
        slider.maxValue = maxExp;
        //slider.value = exp;
    }

    void Update()
    {
        maxExp = PlayerPrefs.GetFloat("maxExp");
        exp = PlayerPrefs.GetFloat("exp");
        slider.maxValue = maxExp;
        slider.value = exp;
        //SetExp(exp);
    }

   /* public void SetExp(float exp)
    {
        slider.value = exp;
    }

/*    public void SetLevel()
    {

    }*/
}