How to save boolean properly on Playerprefs? - unity3d

Question

I want to make a shop system if I buy the items, the items will be saved on Playerprefs, no need to buy again when I restart or re-open the game, for that I already make it to setInt but I don't know when I call getInt. I tried to call it in the start method with a new int index but it doesn't work. This my script
for store the itemsType
[System.Serializable]
public class m_ShopItem
{
public Sprite theIcon;
public int price;
public bool isBuyed;
}
Then I make a list
public List<m_ShopItem> ShopItemsList = new List<m_ShopItem>();
[SerializeField] GameObject ShopPanel;
[SerializeField] Transform theContent;
GameObject g;
Button buyBtn;
public GameObject itemTemplate;
private void Start()
{
for (int i = 0; i < ShopItemsList.Count; i++)
{
g = Instantiate(itemTemplate, theContent);
g.transform.GetChild(0).GetComponent<Image>().sprite = ShopItemsList[i].theIcon;
g.transform.GetChild(1).GetComponent<TextMeshProUGUI>().text = ShopItemsList[i].price.ToString();
buyBtn = g.transform.GetChild(2).GetComponent<Button>();
if (ShopItemsList[i].isBuyed)
{
DisableBuyButton();
}
ShopItemsList[i].isBuyed = PlayerPrefs.GetInt("isBuyed") == 1 ? true : false;// i call it Get here
Debug.Log(ShopItemsList[i].isBuyed);
buyBtn.AddEventListener(i, OnShopItemBtnClicked);
}
}
void OnShopItemBtnClicked(int itemIndex)
{
if (m_shopManager.Instance.HasEnoughCoins(ShopItemsList[itemIndex].price))
{
m_shopManager.Instance.UseCoins(ShopItemsList[itemIndex].price);
//purchase Item
ShopItemsList[itemIndex].isBuyed = true;
PlayerPrefs.SetInt("isBuyed", ShopItemsList[itemIndex].isBuyed ? 1 : 0); // SetThe Int here when button clicked and buy the item
//disable the button
buyBtn = theContent.GetChild(itemIndex).GetChild(2).GetComponent<Button>();
DisableBuyButton();
//add avatar
m_Profile.Instance.AddBallType(ShopItemsList[itemIndex].theIcon);
}
else
{
//NoCoinsAnim.SetTrigger("NoCoins");
Debug.Log("You don't have enough coins!!");
}
}
void DisableBuyButton()
{
buyBtn.interactable = false;
buyBtn.transform.GetChild(0).GetComponent<Text>().text = "PURCHASED";
}
but the result is the same I have to rebuy when going to the main menu or restart the game.
Can anyone tell me what's wrong with my script?

Answer 1

Your current problem is that you create only one PlayerPrefs Object with the value being equal to 1 or 0.
So if you buy only one of your shop items all of them get unlocked. Because you only Check if the PlayerPrefs is true(1) or false (0).
To fix that we would need to create a List of unique PlayerPrefs equal to the amount of shop items. We can do that if we add the index in the ShopItemsList to the isBuyed name.
Create initial Playerprefs:
// Called before the Start Function
private void Awake() {
// Loop through all shopping Items
for (int i = 0; i < ShopItemsList.Count; i++) {
// Check if the Item was already bought
bool bought = PlayerPrefs.GetInt("isBuyed"+i) == 1 ? true : false;
// If it was we can't reset the score.
if (!bought) {
// Create a different PlayerPrefs for each Item in the Shop.
PlayerPrefs.SetInt("isBuyed"+i, ShopItemsList[i].isBuyed ? 1 : 0);
}
}
}
...
Now we can check for that PlayerPrefs instead of checking for just once in Start().
Check if Items were bought:
private void Start() {
// Loop through all shopping Items
for (int i = 0; i < ShopItemsList.Count; i++) {
...
// Actualize our values so already bought items can't be bought again
ShopItemsList[i].isBuyed = PlayerPrefs.GetInt("isBuyed"+i) == 1 ? true : false;
// Check if the item was bought
if (ShopItemsList[i].isBuyed) {
DisableBuyButton();
}
...
}
}
We also need to make sure that we set the right PlayerPrefs when we buy a Product from the Shop. To ensure that we can just add the itemIndex parameter we get from the function and add that to the isBuyed name.
Buying Items:
void OnShopItemBtnClicked(int itemIndex) {
...
// Buy the Item.
ShopItemsList[itemIndex].isBuyed = true;
PlayerPrefs.SetInt("isBuyed"+itemIndex, ShopItemsList[itemIndex].isBuyed ? 1 : 0);
...
}