Catch LoadLevel error

Hi Forum

I simply want to check during runtime if a scene is added to the project (File->Build Settings).

Unity throws an error if Application.LoadLevel() is given an invalid scene name (a scene not added to the project). How can I catch this error in JavaScript?

~ce

 

Apparently you can't use try/catch in this case, so...not sure....

--Eric

 

I wonder if I could somehow access the list shown in Build Settings...

 

CarlEmail,

Do you want to check to see if the level exists, without actually loading the level? If you are willing to load the level, of course

Code (csharp):

1.  
2. function LoadNext () {
3.     yield WaitForSeconds(2) ;
4.     try {
5.        Application.LoadLevel(2);
6.     }
7.     catch ( err ) {
8.         Debug.Log("Load level error: "+err) ;  
9.     }
10. }
11.  

Isn't it not possible to compile if a script references a scene that does not exist in the Build Settings scene list?

 

Unfortunately that code isn't going to work for a couple of reasons: 1) You can't use try/catch in a coroutine (using yield turns the function into a coroutine). 2) As I said earlier, try/catch won't work with Application.LoadLevel.

--Eric

 

Yep. I missed the point. Hopefully what I read this morning is to the point: "In your scripts you simply have to query if the level you are about to load has already been downloaded completely. By ensuring your first few levels are not using a lot of assets, you can start your game with only a minimal amount of data." This from the feature improvements list.

 

That has to do with web streaming, not basic error checking to make sure the scene is included in the build settings.

-Jeremy

 

I'm wondering about this too. I'd like my "choose level" icons to know which level they should load, from a variable on the icon script. However, I'd like to be able to catch it if an icon is created for a level that does not exist. So when I do something like this:

Code (csharp):

1.  
2. void OnMouseDown() {
3.      Application.LoadLevel("Level" + thisIconNumber.ToString());
4. }
5.  

and the icon number exceeds the amount of existing levels, I can take care of it instead of failing. Anyone found a solution since 2008?

 

Yes, write an editor script that reads out all scene names and then write that to a text file you load as text asset and only offer those scenes to jump in at all.

or provide said text file manually or through web

thats the way to go

 

Solution incorrect.

 

Solution incorrect?
so doing something like this in an editor file:

Code (csharp):

1.  
2.         string [] scenes =  new string[EditorBuildSettings.scenes.Length];
3.         int count = 0;
4.         foreach(var thing in EditorBuildSettings.scenes)
5.         {
6.             scenes[count] = thing.path;
7.             ++count;
8.         };
9.         return scenes;
10.  

Then saving that as an asset to be used later doesn't work?

 

The only way I've ever been able to detect this case is with something like this:

Code (csharp):

1.  
2. Application.LoadLevel(name);
3.  
4. if (!Application.isLoadingLevel)
5. {
6.   Debug.LogError("Failed to load scene: " + name);
7. }
8.  

 

Thanks Mr. Wolf!

 

For anyone still interested in this, I catch this issue by checking Application.CanStreamedLevelBeLoaded(levelName)

 

Works! Thanks!

 

Thank you! I was looking for this so long and you saved my time! It just works!

 

Great ! Thanks, it solved the same problem for me...

 

Thanks a thousand times from me as well. This was driving me nuts! Now if someone would care to explain to me why a straight forward try/catch is deliberately prevented from working here?

 

Thanks. How isn't there none hacky way to do this???