为什么这些值未添加到PlayerPrefs文件中？

Question

I am trying to save values to files in the PlayerPrefs for my mobile game in Unity however, the files do not update after playing the game.

public class gameManager : MonoBehaviour {

    private static gameManager instance;
    public static gameManager Instance { get { return instance; } }

    public int currentSkinIndex;
    public int currency  = 0;
    public int skinAvailability = 0;

    private void Awake()
    {
        instance = this;
        DontDestroyOnLoad (gameObject);

        if (PlayerPrefs.HasKey ("currency")) {
            // We had a previous session
            currentSkinIndex = PlayerPrefs.GetInt ("currentSkinIndex");
            currency = PlayerPrefs.GetInt ("currency");
            skinAvailability = PlayerPrefs.GetInt ("skinAvailability");
        } else {
            Save ();
        }
    }

    public void Save ()
    {
        PlayerPrefs.SetInt ("currentSkin", 0);
        PlayerPrefs.SetInt ("currency", 0);
        PlayerPrefs.SetInt ("skinAvailability", 1);
    }
}

Answer 1

I think the logic that you wrote has a problem! In Awake() you have two conditions => if there is key and if the is not!

You want to save some values to playerprefs and you have the save function already, but in Awake() you just call it under two conditions, here is what your code says:

1. Search through existing player prefs if the values exist, retrieve them
2. Or if they don't exist, then save them as I order to you to save them (inside save function logic => currency = 0 , current skin = 0, skinAvailability = 1 )
3. Then do nothing. Keep in mind that all of this happens during Awake()

But the new values that you get after playing the game need to be saved too! And you don't save them!

Your code does not say to "after I played the game (and the variables have changed), save the values again. "

You need to save them again! For example you can do that when exiting the play scene by writing a function or if you already written that function, you can assign it to a button which is been called savebtn which calls that function when clicked.