排行榜的開發利用PlayerPrefs來實現資料持久化，對PlayerPrefs不瞭解的同學先去看一下我這個部落格

先建立好UI

先在GameController裡面初始化鍵值。我們只有五個榜位，為什麼要建立6個呢，因為我們要儲存新的得分和等級，用來和已經儲存的相比較，用氣泡排序來實現排序。

再儲存資料，並且進行排序

排行榜程式碼

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

public class RankingPanel : BasePanel {
    private Text PanelName;
    private Button onest;
    private Button twost;
    private Button threest;
    private Button fourest;
    private Button fiveest;
    private Button backToMenu;
    public override void OnEnter()
    {
        SetValue();
        EnterAnim();
    }
    public override void OnExit()
    {
        ExitAnim();
    }
    // Use this for initialization
    void Awake () {
        PanelName = transform.Find("Ranking").GetComponent<Text>();
        onest = transform.Find("1st").GetComponent<Button>();
        twost = transform.Find("2st").GetComponent<Button>();
        threest = transform.Find("3st").GetComponent<Button>();
        fourest = transform.Find("4st").GetComponent<Button>();
        fiveest = transform.Find("5st").GetComponent<Button>();
        backToMenu = transform.Find("BackToMenu").GetComponent<Button>();
        backToMenu.onClick.AddListener(BackToMenu);
        PanelName.transform.localPosition = new Vector3(5, 1500, 0);
        onest.transform.localPosition = new Vector3(5,-1500,0);
        twost.transform.localPosition = new Vector3(5, -1500, 0);
        threest.transform.localPosition = new Vector3(5, -1500, 0);
        fourest.transform.localPosition = new Vector3(5, -1500, 0);
        fiveest.transform.localPosition = new Vector3(5, -1500, 0);
        backToMenu.transform.localPosition = new Vector3(5, -1500, 0);
        InActiveUI();
    }
	
    private void SetValue()
    {
        onest.transform.Find("Text").GetComponent<Text>().text = " 1ST " + "Lv. " + PlayerPrefs.GetInt(PlayerPrefs.GetString("Top1L"))
            + " Score " + PlayerPrefs.GetInt(PlayerPrefs.GetString("Top1S"));
        twost.transform.Find("Text").GetComponent<Text>().text = " 2ST " + "Lv. " + PlayerPrefs.GetInt(PlayerPrefs.GetString("Top2L"))
            + " Score " + PlayerPrefs.GetInt(PlayerPrefs.GetString("Top2S"));
        threest.transform.Find("Text").GetComponent<Text>().text = " 3ST " + "Lv. " + PlayerPrefs.GetInt(PlayerPrefs.GetString("Top3L"))
            + " Score " + PlayerPrefs.GetInt(PlayerPrefs.GetString("Top3S"));
        fourest.transform.Find("Text").GetComponent<Text>().text = " 4ST " + "Lv. " + PlayerPrefs.GetInt(PlayerPrefs.GetString("Top4L"))
            + " Score " + PlayerPrefs.GetInt(PlayerPrefs.GetString("Top4S"));
        fiveest.transform.Find("Text").GetComponent<Text>().text = " 5ST " + "Lv. " + PlayerPrefs.GetInt(PlayerPrefs.GetString("Top5L"))
            + " Score " + PlayerPrefs.GetInt(PlayerPrefs.GetString("Top5S"));
    }
    private void EnterAnim()
    {
        ActiveUI();
        PanelName.transform.DOLocalMoveY(567,0.07f);
        onest.transform.DOLocalMoveY(328,0.1f);
        twost.transform.DOLocalMoveY(164, 0.13f);
        threest.transform.DOLocalMoveY(0, 0.15f);
        fourest.transform.DOLocalMoveY(-166, 0.17f);
        fiveest.transform.DOLocalMoveY(-332, 0.19f);
        backToMenu.transform.DOLocalMoveY(-633, 0.2f);
    }
    private void ExitAnim()
    {
        PanelName.transform.DOLocalMoveY(1500, 0.07f);
        onest.transform.DOLocalMoveY(-1500, 0.2f);
        twost.transform.DOLocalMoveY(-1500, 0.19f);
        threest.transform.DOLocalMoveY(-1500, 0.17f);
        fourest.transform.DOLocalMoveY(-1500, 0.15f);
        fiveest.transform.DOLocalMoveY(-1500, 0.13f);
        backToMenu.transform.DOLocalMoveY(-1500, 0.1f).OnComplete(()=>InActiveUI());
    }
    private void ActiveUI()
    {
        PanelName.gameObject.SetActive(true);
        onest.gameObject.SetActive(true);
        twost.gameObject.SetActive(true);
        threest.gameObject.SetActive(true);
        fourest.gameObject.SetActive(true);
        fiveest.gameObject.SetActive(true);
        backToMenu.gameObject.SetActive(true);
    }
    private void InActiveUI()
    {
        PanelName.gameObject.SetActive(false);
        onest.gameObject.SetActive(false);
        twost.gameObject.SetActive(false);
        threest.gameObject.SetActive(false);
        fourest.gameObject.SetActive(false);
        fiveest.gameObject.SetActive(false);
        backToMenu.gameObject.SetActive(false);
    }
    private void BackToMenu()
    {
        UIManager.Instance.PopPanel();
        UIManager.Instance.PushPanel(UIPanelType.GameStart);
    }
}
 

然後我們只要在需要儲存遊戲的地方呼叫SaveScore（）函式就可以了。下次進入遊戲就依舊可以看到之前的排行榜。

總結：其實看到這，聰明的小夥伴已經發覺到可以用同樣的方法做存檔讀檔，固然可以，但是，同時我們發現了局限性，這個Demo很簡單，用PlayerPrefs沒問題，一旦遊戲複雜起來..........想想需要儲存的鍵值對數目就令人髮指，所以我推薦大家平時開發遊戲，用JSON來實現存檔讀檔。（其加密手段也很多，很安全）