How to make lock/unlock level system with playerprefs(UI Button)?

Hi everyone, In my 2D platforms I'm trying to make an unlock/lock level system with playerprefs...
Unfortunately I do not know how to use playerprefs ... Can you help me?
I have a script for change scene.. i need only a script that allows me to change a button (level lock)
with another button (level unlock) and save progress... Thanks

(Sorry for my english)

 

Attach this script somewhere in your scene, then set it's "SaveLevel" function to the level unlock Button's OnClick, or call the function via code:

Code (csharp):

1.  
2. public class LevelSaver : MonoBehaviour{
3.   //This function should be called through the button's OnClick
4.   public void SaveLevel(int id){
5.     PlayerPrefs.SetInt("level",id);
6.   }
7. }
8.  

Attach this script to the level lock Button, then, at the inspector, set the "levelRequirement" field to the level that the Button should be unlocked at.

Code (csharp):

1.  
2. public class LevelLock : MonoBehaviour{
3.   //This field should be set by the inspector
4.   [SerializeField] int levelRequirement;
5.   public void Start(){
6.     int currentLevel = PlayerPrefs.GetInt("level");
7.     bool levelUnlocked = currentLevel >= levelRequirement;
8.     GetComponent<Button>().interactable = levelUnlocked;
9.   }
10. }
11.  

I think this thread should be posted in the general support section.

EDIT: Clarification

 

I have tested this code and it simply unlocks the next level as you click on your first one and so on.

It works great, but I cannot get this to work so when you enter level 2 it unlocks the level 2 button. Simply by clicking the level 1 button it automatically unlocks level 2 for you.

I am still trying to configure it so as the character enters level 2 it then unlocks the level 2 button.

 

Call the SaveLevel(id) function on the event when the player enters level 2, via code.

 

Code (CSharp):

1.     public GameObject loading;
2.  
3.     public GameObject[] levelLocks;
4.  
5.     void Start()
6.     {
7.  
8.  
9.         for (int a = 0; a < levelLocks.Length; a++) {
10.  
11.             if (PlayerPrefs.GetInt ("Level" + a.ToString () == 3))  // 3 => true , 0 => false
12.                 levelLocks [a].SetActive (false);
13.             else
14.                 levelLocks [a].SetActive (true);
15.  
16.         }
17.     }
18.  
19.     public void SelectLevel(int number)
20.     {
21.         if (PlayerPrefs.GetInt ("Level" + number.ToString () == 3)) {  // 3 => true , 0 => false
22.             loading.SetActive (true);
23.             Application.LoadLevel ("LevelName" + number.ToString ());
24.         }
25.     }

0. Assign script to canvas.
1. Drag level buttons lock icons respectively in LevelLocks slot.
2. Call SelectLevel function from your level buttons in inspector(onClick from inspector).
3. Set level number as number in SelectLevel function in inspector (0,1,2,3,4,5,n)
4. Assign a UI Text or UI Image as loading game object to my script. its will be activated before calling LoadLevel function.

If you want to unlock a new level call this function in end of your level:

Code (CSharp):

1.     void UnlockLevel(int number)
2.     {
3.         PlayerPrefs.SetInt ("Level" + number.ToString (), 3);  // 3 => true , 0 => false
4.     }

 

Thanks, I will try that at some stage. I figured out though that I can not call anything through a trigger. My touch controls for some reason are overriding all of this.

 

how will you save unlocking levels to binary formatter?

 

I don't know ...

 

hi every one i am locking my levels with button interactive false every thing is working fine but when i unlock the next level every thing work fine after unlocking the next level when i play previous levels again upcoming level become false
here is my code if anybody can help please

if(assaultParent.transform.GetChild (PlayerPrefs.GetInt ("levelassault")+1).GetComponent<Button> ().enabled== false){
print ("level locked"+assaultParent.transform.GetChild (PlayerPrefs.GetInt ("levelassault")+1).name);
assaultLevelUnlocking = PlayerPrefs.GetInt ("levelassault");
for (int i = 0; i <=assaultLevelUnlocking; i++) {
assaultParent.transform.GetChild (i).GetComponent<Button> ().enabled= true;
assaultParent.transform.GetChild (i).GetComponent<Image> ().color = Color.white;
}
}

 

Can you please explain how to do that. I've been trying for hours but I can't get it to work.

 

@AndrijaPC @LightingBox2 if (PlayerPrefs.GetInt ("Level" + a.ToString () == 3)) this line generate a error how to solve this error, i m working on 2d game and implement level lock and unlock system i mfacing this issue??thanks for answers

 

i have same erro , we still learning code haha

 

it is working like if we play level 1 there has unlock level 2 same as for level 3 but after it if we play level 1 again it maked lock level 3 and only unlock level 2...
Why?

 

https://www.incern.org/2023/03/level-lock-unlock-system-unity.html