koobas.hobune.stream
save unlocked character by Playerprefs
hello. I have a code in which when you click on a button and you have enough coins, it must be unlocked and a piece of wood with price on it that acts like a lock must be disappear. Every thing works fine, but when I restart the game, every thing returns to default. I'm new to unity and I want to use Playerprefs but I don't know how exactly. here is my script;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.UI;
public class MainMenu3 : MonoBehaviour {
public Button WhitePlane;
public Button BluePlane;
public static int character_number;
public GameObject wood1;
public GameObject wood2;
void Start () {
character_number = PlayerPrefs.GetInt ("Number");
BluePlane.onClick.AddListener (() => {
character_number=1;
if (UIManager2.coin_score>=1) {
UIManager2.coin_score--;
wood1.setactive (false);
SceneManager.LoadScene ("Menu2");
}
});
WhitePlane.onClick.AddListener (() => {
character_number=2;
if (UIManager2.coin_score>=2){
UIManager2.coin_score--;
UIManager2.coin_score--;
wood2.setactive(false);
SceneManager.LoadScene ("Menu2");
}
});
void Update () {
PlayerPrefs.SetInt ("Number", character_number);
}
You've already posted this didn't you ? Debug "character_number" right at the beginning of Start() and see if it has value you expect it to have (same values as in previous game). Pretty sure it is same value and it's not PlayerPrefs problem as I mentioned in previous thread.
I tried something like Debug.Log(character_number) at the beginning of start as you said but I couldn't see anything in console! should I try a different code? @lipisis
You are on the right path, only that the PlayerPrefs.SetInt ("Number", character number); must be immediately after the value character number is setted, not in the Update loop
I already tried that but it didn't work. I put SetInt right after where character_number is set but when I restart the game, the lock still exists and the character is still locked! @Jasr_88
Oh well, thas because you need to store a list of characters unlocked, and show or hide the butons based on that list, something like this:
// The current player selected
PlayerPrefs.GetInt ("Number");
// The "list" of the characters unlocked
// This code must go in your "Unlock Character" Logic
PlayerPrefs.SetInt("character1Unlocked", [0|1]);
PlayerPrefs.SetInt("character2Unlocked", [0|1]);
bool character1Unlocked = PlayerPrefs.GetInt ("character1Unlocked")==0? false:true;
bool character2Unlocked = PlayerPrefs.GetInt ("character2Unlocked")==0? false:true;
// This code must go in you "Show Characters" logic
if(character1Unlocked){
// Sentences to show the character1 unlocked...
} else {
// Sentences to show the character1 locked...
}
In your code you never verify if the user has previously unlocked the character, only if have enough coins to buy it. But i bet that the value stored in PlayerPrefs is the right one.
EDIT: Sorry that was my bad, there is no such thing as Get/Set bool on PlayerPrefs you need to do a logic to convert an int flag to a bool
Thanks but using your code, Unity shows the message that "Unity can't implicitly convert type "int" to "bool". SetBool can't be identified by unity. could you please put your code in my script? I don't know how to use it! @Jasr_88
$$anonymous$$y code is not a working script, is just for reference. To make your code works try something like this
void Start () {
character_number = PlayerPrefs.GetInt ("Number");
bool character1Unlocked = PlayerPrefs.GetInt ("character1Unlocked")==0? false:true;
bool character2Unlocked = PlayerPrefs.GetInt ("character2Unlocked")==0? false:true;
// Activate or deactivate the buttons (This is what is missing in your original code)
wood1.setactive (character1Unlocked);
wood2.setactive (character2Unlocked);
BluePlane.onClick.AddListener (() => {
character_number=1;
PlayerPrefs.SetInt ("Number", character_number);
if (UI$$anonymous$$anager2.coin_score>=1) {
UI$$anonymous$$anager2.coin_score--;
PlayerPrefs.SetInt ("character1Unlocked", 1); // 0 is Locked, 1 is Unlocked....
wood1.setactive (false);
Scene$$anonymous$$anager.LoadScene ("$$anonymous$$enu2");
}
});
Also, take into consideration the following: even dough this code works, it still requires some optimization, but for now, it will help you understand the basic use of "PlayerPrefs"
Hope it helps
Thanks. I now understand that I should have set a boolean for lock/unlock and also for Playerprefs. I really don't know what's wrong! It doesn't work yet! Below is my original script. BluePlane is already unlocked by default and UIManager2.coin_score refers to number of coins to be saved and loaded after buying any item. I thought it might be something wrong with this piece of code but nothing changed after I erased that.
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.UI;
public class MainMenu3 : MonoBehaviour {
public Button WhitePlane;
public Button BluePlane;
public static int character_number;
public GameObject wood1;
public bool WhitePlaneUnlocked;
void Start () {
character_number = PlayerPrefs.GetInt ("Number");
WhitePlaneUnlocked = PlayerPrefs.GetInt ("WhitePlaneUnlocked") == 0 ? false:true;
wood1.SetActive (WhitePlaneUnlocked);
BluePlane.onClick.AddListener (() => {
character_number=1;
SceneManager.LoadScene ("Menu2");
}
});
UIManager2.coin_score = PlayerPrefs.GetInt ("Score");
WhitePlane.onClick.AddListener (() => {
character_number=2;
PlayerPrefs.SetInt ("Number", character_number);
if (UIManager2.coin_score>=2){
UIManager2.coin_score-=2;
PlayerPrefs.SetInt("WhitePlaneUnlocked",1);
wood1.setactive(false);
SceneManager.LoadScene ("Menu2");
}
});
As far as I know, if statement for number of coins must be terminated once it's character selected. I thought assigning a variable could be helpful. I tried many ways but none of them worked! I really don't know what to do. @Jasr_88
I found [This][1] video really helpful. I had some amazing improvements but still it doesn't work! I worked on it for about 4 hours. for the first time my coins didn't change; second time button interactability changed to false and so on. Could you please take a look at this video? This is my first game. @Jasr_88
[1]: https://www.youtube.com/watch?v=G_I6GxGIB_Y
The problem with your code is that you have not assigned a default value to your PlayerPref. Often PlayerPrefs behaves weird when they are not assigned with a default value. So here is the solution to your problem:
In Start function, just replace
character_number = PlayerPrefs.GetInt ("Number");
with
if(!PlayerPrefs.HasKey ("Number")) {
PlayerPrefs.SetInt ("Number", defaultValue);
}
character_number = PlayerPrefs.GetInt ("Number");
Replace defaultValue with your desired default value.
Hopefully, this small change will help you solve your problem. Now PlaayerPref will initialize when running for the first time and after that will never show weird behavior.
Note: After applying these changes, Go to Edit and click Clear All PlayerPrefs, and then run the program to test whether changes worked or not.
Enjoy.. !!!! ;)
Thanks. I tried that but I think it must be my fault! What I want : Once one of the characters is selected, your coins must be decreased according to it's price and when you restart the game and that character is selected again, it must not be locked and your coins must not be decreased either. I followed @Jasr_88 instruction but I don't know really what's wrong! I tried instruction by this video and here is my script;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Scene$$anonymous$$anagement;
using UnityEngine.UI;
using UnityEditor;
public class $$anonymous$$ain$$anonymous$$enu3 : $$anonymous$$onoBehaviour {
int SceneIndex;
public Button BluePlane;
public Button WhitePlane;
public GameObject wood;
public static int character_number;
public int isPlanesold;
// Use this for initialization
void Start () {
isPlanesold = PlayerPrefs.GetInt ("isPlanesold");
if (!PlayerPrefs.HasKey ("Number")) {
PlayerPrefs.SetInt ("Number", 1);
}
character_number = PlayerPrefs.GetInt ("Number");
UI$$anonymous$$anager2.coin_score = PlayerPrefs.GetInt ("Score");
SceneIndex = Scene$$anonymous$$anager.GetActiveScene ().buildIndex;
}
public void Blueplane () {
character_number = 1;
Scene$$anonymous$$anager.LoadScene ("$$anonymous$$enu2");
}
public void BuyWhitePlane () {
if (UI$$anonymous$$anager2.coin_score >= 1 && isPlanesold ==0) {
WhitePlane.interactable = true;
PlayerPrefs.SetInt ("isPlanesold", 1);
character_number = 2;
UI$$anonymous$$anager2.coin_score--;
wood.SetActive (false);
PlayerPrefs.SetInt ("Score", UI$$anonymous$$anager2.coin_score);
PlayerPrefs.SetInt ("Number", character_number);
Scene$$anonymous$$anager.LoadScene ("$$anonymous$$enu2");
}
else
WhitePlane.interactable = false;
}
void Update () {
if (Input.GetKeyDown (KeyCode.Escape))
Scene$$anonymous$$anager.LoadScene (SceneIndex - 1);
}
it's okay. when for example I earn 1 coin by BluePlane that's already unlocked by default and click on WhitePlane button, it works fine but when I restart the game, the button returns to WhitePlane.interactable = false; I know what should I do but I really don't know how! @me$$anonymous$$Umar
