Load nextLevel with a button click

Question

Can anyone help me someone with this code?

I'd like to go to the next level by clicking a button: example my level name is L1,L2,L3,L4,L5,L6,L7 and when I finish level L1, I want to go to level L2 with the click of a button, and from L5 go to L6 like this.

public class GameLevels : MonoBehaviour {

 public Button Play;
 private int idLevel;
 // Use this for initialization
 void Start () 
 {
     idLevel = PlayerPrefs.GetInt("idLevel");
     Play.interactable = false;
 }
 public void SelectLevel(int i){
     idLevel = i;
     PlayerPrefs.SetInt ("idLevel", idLevel);
     Play.interactable = true;
 }

 public void LoadLevel(string Levels)
 {
     SceneManager.LoadScene (Levels);
 }
 public void Replay()
 {
     SceneManager.LoadScene ("L" + idLevel.ToString ());
 }
 public void loadNextLevel() 
 {

 }
}

Answer 1

If this is the Replay button and it works (As we don't have the full code, I'm not sure if it works but I'm assuming it does):

public void Replay()
{
    SceneManager.LoadScene ("L" + idLevel.ToString ());
}

Then it stands to reason that the following should be the next level's code:

public void loadNextLevel() 
{
PlayerPrefs.SetInt("idLevel", idLevel+1);
SceneManager.LoadScene ("L" + (idLevel+1).ToString ());
}

Since idLevel is declared as an int, you can just add 1 and then turn it into a string.

You can also do this (when you load the next level, idLevel will be reset if I'm not mistaken, so it should be safe to do it this way too):

public void loadNextLevel() 
{
idLevel++;
PlayerPrefs.SetInt("idLevel", idLevel);
SceneManager.LoadScene ("L" + idLevel.ToString ());
}

P.S. You shouldn't have to turn it into a string because when you add an int to a string, it will also act as a string. Just make sure you do the math before the string addition, so don't forget to use the parentheses where we do (idLevel+1). So, SceneManager.LoadScene ("L" + (idLevel+1)); should also work.

Answer 2

try the simple code. it ll solve your problem

//to reload the Level

public void Replay(){
    Application.LoadLevel (Application.loadedLevel);
}

//To load next level

public void NxtLevel(){
    Application.LoadLevel (Application.loadedLevel + 1);
}

this ll load the level by using level id. Located in build settings -> Scenes in build.

Answer 3

Its may look like this :

 public class GameLevels : MonoBehaviour {

 public Button Play;
 private int idLevel;
 // Use this for initialization
 void Start () 
 {
     idLevel = PlayerPrefs.GetInt("idLevel");
     Play.interactable = false;
 }
 public void SelectLevel(int i){
     idLevel = i;
     PlayerPrefs.SetInt ("idLevel", idLevel);
     Play.interactable = true;
 }

 public void LoadLevel(string Levels)
 {
     SceneManager.LoadScene (Levels);
 }
 public void Replay()
 {
     SceneManager.LoadScene ("L" + idLevel.ToString ());
 }
 public void loadNextLevel() 
 {
  int idLevelSecond = PlayerPrefs.GetInt("idLevel");
  string thelevelnumber = idLevelSecond.ToString();
  string leveltoload = "L" + thelevelnumber;
  Debug.Log(leveltoload);
  SceneManager.LoadScene(leveltoload);
 }
}

UNTESTED ! if the code did not work, tell me.