how to stop tiles from spawning after a certain number in unity3d - unity3d

Question

I have a script that spawns endless tiles (3D) and i want it to stop at after a certain number (e.g. 100) and at the end of the last tile (the 100th) i want to spawn an other prefab like a portal.
I have no clue how to do that.
Any answer i have found on google couldnt help.
Any help is much appreciated.
void Start()
{
nextTileLocation = startPoint;
nextTileRotation = Quaternion.identity;
for (int i = 0; i < initSpawnNum; ++i)
{
SpawnNextTile (i >= initNoObstacles);
}
}
public void SpawnNextTile(bool spawnObstacles = true)
{
var newTile = Instantiate (tile, nextTileLocation, nextTileRotation);
var nextTile = newTile.Find ("Next Spawn Point");
nextTileLocation = nextTile.position;
nextTileRotation = nextTile.rotation;
if (!spawnObstacles)
return;
var obstacleSpawnPoints = new List<GameObject> ();
foreach (Transform child in newTile) {
if (child.CompareTag ("ObstacleSpawn")) {
obstacleSpawnPoints.Add (child.gameObject);
}
}
if (obstacleSpawnPoints.Count > 0) {
var spawnPoint = obstacleSpawnPoints [Random.Range (0, obstacleSpawnPoints.Count)];
var spawnPos = spawnPoint.transform.position;
var newObstacle = Instantiate (obstacle, spawnPos, Quaternion.identity);
newObstacle.SetParent (spawnPoint.transform);
}
}

Answer 1

You could do something like pass in a bool to tell the function to spawn a portal.
void Start()
{
nextTileLocation = startPoint;
nextTileRotation = Quaternion.identity;
for (int i = 0; i < initSpawnNum; ++i)
{
// Pass in true for the last tile
SpawnNextTile (i >= initNoObstacles, i == initSpawnNum - 1);
}
}
public void SpawnNextTile(bool spawnObstacles = true, bool shouldSpawnPortal = false)
{
//
}
Edit to show adding the tiles to a list:
class YourScript : MonoBehaviour
{
private List<GameObject> tiles = new List<GameObject>();
private void SpawnNextTile(bool spawnObstacles = true, bool shouldSpawnPortal = false)
{
var newTile = Instantiate (tile, nextTileLocation, nextTileRotation);
tiles.Add(newTile);
// The rest of your code
}
}