Stuck on the GameDev.tv Unity Authorized course.

Hello Everyone. I downloaded unity a week ago and bought the unity authorized gamedev.tv course on Udemy. I am on the segment (7: Spawn Manager) and on the episode (6: Stop Spawning when Player Dies). I try to run my code when he finishes the episode, but i have a unity compiler error saying that it doesn't have a definition for OnPlayerDeath. Can someone please help me figure out what's wrong? I'll link the modified code below.

Player.cs

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class Player : MonoBehaviour
6. {
7.     [SerializeField]
8.     private float _speed = 3.5f;
9.     [SerializeField]
10.     private GameObject _laserPrefab;
11.     [SerializeField]
12.     private float _firerate = 0.5f;
13.     private float _canfire = 1f;
14.     [SerializeField]
15.     private int _lives = 3;
16.     private SpawnManager _spawnManager;
17.  
18.  
19.     void Start()
20.     {
21.  
22.         transform.position = new Vector3(0, 0, 0);
23.         _spawnManager = GameObject.Find("Spawn_Manager").GetComponent<SpawnManager>();
24.  
25.         if(_spawnManager == null)
26.         {
27.             Debug.Log("The Spawn Manager is NULL");
28.         }
29.     }
30.  
31.  
32.     void Update()
33.     {
34.         CalculateMovement();
35.  
36.         if (Input.GetKeyDown(KeyCode.Space) && Time.time > _canfire)
37.         {
38.             _canfire = Time.time + _firerate;
39.  
40.             Instantiate(_laserPrefab, transform.position + new Vector3(0, 0.8f, 0), Quaternion.identity);
41.         }
42.  
43.  
44.     }
45.  
46.     void CalculateMovement()
47.     {
48.         float horizontalinput = Input.GetAxis("Horizontal");
49.         transform.Translate(Vector3.right * horizontalinput * _speed * Time.deltaTime);
50.         float verticalinput = Input.GetAxis("Vertical");
51.         transform.Translate(Vector3.up * verticalinput * _speed * Time.deltaTime);
52.  
53.  
54.         if (transform.position.y >= 0)
55.         {
56.             transform.position = new Vector3(transform.position.x, 0, 0);
57.         }
58.         else if (transform.position.y <= -3.8f)
59.         {
60.             transform.position = new Vector3(transform.position.x, -3.8f, 0);
61.         }
62.  
63.         if (transform.position.x > 11.3f)
64.         {
65.             transform.position = new Vector3(-11.3f, transform.position.y, 0);
66.         }
67.         else if (transform.position.x < -11.3f)
68.         {
69.             transform.position = new Vector3(11.3f, transform.position.y, 0);
70.         }
71.     }
72.  
73.     public void Damage()
74.     {
75.         _lives--;
76.  
77.         if (_lives < 1)
78.         {
79.             _spawnManager.OnPlayerDeath();
80.             Destroy(this.gameObject);
81.         }
82.     }
83. }

SpawnManager.cs

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class SpawnManager : MonoBehaviour
6. {
7.     [SerializeField]
8.     private GameObject _enemyPrefab;
9.    [SerializeField]
10.     private GameObject _enemyContainer;
11.  
12.     private bool _stopSpawning;
13.     // Start is called before the first frame update
14.     void Start()
15.     {
16.         StartCoroutine(SpawnRoutine());
17.        
18.     }
19.  
20.     // Update is called once per frame
21.     void Update()
22.     {
23.      
24.     }
25.  
26.     IEnumerator SpawnRoutine()
27.     {
28.         while(_stopSpawning == false)
29.         {
30.             Vector3 postoSpawn = new Vector3(Random.Range(-8f, 8f), 7, 0);
31.           GameObject newEnemy =  Instantiate(_enemyPrefab, postoSpawn, Quaternion.identity);
32.             newEnemy.transform.parent = _enemyContainer.transform;
33.             yield return new WaitForSeconds(5.0f);
34.         }
35.     }
36.  
37.     public void OnPlayerDeath()
38.     {
39.         _stopSpawning = true;
40.     }
41.  
42.  
43. }
44.  

 

I can't see an error just by looking your code. You have to be more specific, namely where exactly is your error pointing to, and what exactly it says. Also it matters whether the error is a compile-error, or a run-time one.

In the meanwhile, you could make sure that your names are typed correctly (i.e. "Spawn_Manager").

 

Ok, you said it was a compiler error.

What is the editor you're using?
Most editors will show you such an error before this code is compiled, by rendering a squiggly red line beneath the unknown identifier.

You haven't made any of the classic mistakes regarding what is happening to you, so I have to infer that you're error is in fact, outside the scope that you've described and simply precipitates into a misleading situation. And this can happen very frequently, and typically leads to headaches.

Try to approach it holistically, and reexamine something else that could've caused such an error. Where is this other script located for example. And do you have some other errors or warnings as well?

 

I'm using Visual Studio 2019. I have no errors (in visual studio), nor the red lines. Yes, I do have an error in the unity compiler, here's what it is:
Assets\Scripts\Player.cs(79,27): error CS1061: 'SpawnManager' does not contain a definition for 'OnPlayerDeath' and no accessible extension method 'OnPlayerDeath' accepting a first argument of type 'SpawnManager' could be found (are you missing a using directive or an assembly reference?)

 

I got the error in the unity console, so I don't really know if that's runtime or compiler. I'm going through and triple checking now to see if I misspelled anything.

 

@geffpants I put your two scripts into separate .cs files on my system and they compile just fine.

Maybe Visual studio lost its mind, as it sometimes does. Right click on one of the scripts and reimport it. Then try the other if that doesn't work. There is no visible typo in the code above.

 

Also:
* Check to make sure you don't have a duplicate SpawnManager
* Try commenting out the line "_spawnManager.OnPlayerDeath();" and seeing what happens
* Try re-typing out the OnPlayerDeath function, and the code that is calling that function - sometimes if you copy and paste code, you can get odd characters.

 

Hi @geffpants, were you able to solve this issue?

I am running into the same problem and Visual Studio is giving me this error:

''Non-invocable member 'SpawnManager.OnPlayerDeath' cannot be used like a method.

If I comment out the line it works just fine - and the tutorial seems to have it exactly the same as I do, but in the video it works ^^ Mind boggling.

Thanks!

 

Figured it out like a big boy ^^.

I was missing:

Code (CSharp):

1. public void OnPlayerDeath()
2. {
3. _stopSpawning = true;
4. }

in the SpawnManager.cs

and instead had:

Code (CSharp):

1.  public object OnPlayerDeath { get; internal set; }

No idea how that happened, but in case you haven't found a fix yet - check for something similar.

Best,

 

Same thing happent to me. Guess what? I had to save (CTRL + S) the scripts, so the changes would upload in Unity... Noob devs, you gotta luv us! <3

 

OMG just letting you know... same happens to me, and other year and other Noob.
hehehe