gameobject object 变量未分配，我如何在脚本中统一分配？

Question

I have tried to assign my prefab Bridge in many different ways.

I still get an error saying "variable of bridge in GameManager has not been assigned"

Is there anyway to fix this issue please, Would be more than happy an appreciative if anyone can help me out!

public GameObject Bridge;
public GameObject player;

public float spawnSpacer = 10f;
public float rightSpacer = 10f;
public float leftSpacer = 10f;

int spawnNum;

public float spawnDelay = 1f;

public List<Movement> bridges;

bool left;

private void Start()
{
    InvokeRepeating(nameof(InitialSpawns), spawnDelay, spawnDelay);
}

private void Update()
{
    if (Input.GetMouseButtonDown(0))
    {
        StopBridge();
        SpawnBridge();
    }
}

public void StopBridge()
{
    if (bridges.Count != 0)
    {
        bridges[0].locked = true;
        bridges.Remove(bridges[0]);
    }
}

public void SpawnBridge()
{

    //Determine spawn location by manipulating player position.
    Vector3 spawnPosition = player.transform.position;
    spawnPosition.x += spawnSpacer;
    if (left)
    {
        spawnPosition.z += leftSpacer;
        left = false;
    }
    else if (!left)
    {
        spawnPosition.z -= leftSpacer;
        left = true;
    }
    //Spawn a new platform.
    GameObject newBridge = Instantiate(Bridge, spawnPosition, player.transform.rotation);
    if (left)
        newBridge.GetComponent<Movement>().left = true;
    else if (!left)
        newBridge.GetComponent<Movement>().right = true;
    bridges.Add(newBridge.GetComponent<Movement>());
}

void InitialSpawns()
{
    if (spawnNum == 5)
        CancelInvoke(nameof(InitialSpawns));
    SpawnBridge();
    spawnNum++;
}

}

Answer 1

What is happening if you try to drag the object "Bridge" from the hierarchy to inspector in editor? if it is still not working then to set it via script use:

public GameObject Bridge = GameObject.Find("ObjectName");

alternatively, you can also use the tag of the object to find it:

public GameObject Bridge = GameObject.FindGameObjectWithTag("GameObject Tag"). gameObject;