从 C# 中的不同类访问布尔值

Question

I have one collision script in which I set a boolean to true or false

using UnityEngine;
using System.Collections;

public class IsTriggerLockCamera : MonoBehaviour {
    public bool CameraLock = false;

    public void OnTriggerStay2D(Collider2D other) {
        CameraLock = true;
        Debug.Log ("Im inside"); 

    }

        public void OnTriggerExit2D(Collider2D other) {
        CameraLock = false;
        Debug.Log ("I exited");
    }


}

I want to access this boolean from my camera script, I tried this

if (CameraLock == true) {
            Debug.Log ("Im locked");
        }

However, I get an error saying that CameraLock doesn't exist in the current context. The boolean is public so I'm very confused.

---

EDIT: I feel like I didn't give good enough info so I'll start by posting the whole camera script and then clarifying.

using System;
using UnityEngine;

    public class CameraFollowLockY : MonoBehaviour
    {
        public Transform target;
        public float damping = 1;
        public float lookAheadFactor = 3;
        public float lookAheadReturnSpeed = 0.5f;
        public float lookAheadMoveThreshold = 0.1f;

        private float m_OffsetZ;
        private Vector3 m_LastTargetPosition;
        private Vector3 m_CurrentVelocity;
        private Vector3 m_LookAheadPos;

        private void Start()
        {
            m_LastTargetPosition = target.position;
            m_OffsetZ = (transform.position - target.position).z;
            transform.parent = null;
        }


        private void Update()
        {
            float xMoveDelta = (target.position - m_LastTargetPosition).x;

            bool updateLookAheadTarget = Mathf.Abs(xMoveDelta) > lookAheadMoveThreshold;

            if (updateLookAheadTarget)
            {
                m_LookAheadPos = lookAheadFactor*Vector3.right*Mathf.Sign(xMoveDelta);
            }
            else
            {
                m_LookAheadPos = Vector3.MoveTowards(m_LookAheadPos, Vector3.zero, Time.deltaTime*lookAheadReturnSpeed);
            }

            Vector3 aheadTargetPos = target.position + m_LookAheadPos + Vector3.forward*m_OffsetZ;
            Vector3 newPos = Vector3.SmoothDamp(transform.position, aheadTargetPos, ref m_CurrentVelocity, damping);

            transform.position = newPos;
            transform.position = new Vector3(transform.position.x, 0, transform.position.z);

            m_LastTargetPosition = target.position;


        if (CameraLock == true) {
            Debug.Log ("Im locked");
        }
}

The IsTriggerLockCamera is a script I used for an invisible collider in Unity. My camera is focused on the player at all times, but I want it to stop moving when the player is close to reaching the edge of the map, so he can notice that the map is ending. The original plan was, that the collider would send out information when player enters it and then instead of Debug.Log ("Im Locked"); would be some code that would lock the camera in place. I don't know if this solution is very elegant and I'd like to apologize for not clarifying everything properly beforehand, but I started coding probably 2 months ago (I did only Rails websites) and I got into C# game development about a week ago so I'm still missing the terminology required to properly describe the problems I encounter. So far, no suggestion has worked. The closest working suggestion was OnoSendai's suggestion, but apparently it's not allowed to create MonoBehaviour using "new".

---

Edit2: Making the boolean static didn't work at first, but then I realized that I had to make some changes in my camera script as well, so it works now, but Philip said that it's a bad advice - I personally have no idea why, I assume that it's something like using !important in CSS, you just use it as a last resort because it makes the code not that flexible - so I'm still open to ideas.

Answer 1

You may want to try a full reference to the CameraLock property based on the object instance - as in

    var objRef = new IsTriggerLockCamera(); // Just an example of object reference - 
                                            // You may already have one
                                            // on your code.

    if (objRef.CameraLock) {
        Debug.Log ("Im locked");
    }

That happens because CameraLock is marked as public , but not as static - it only exists on a instantiated object.

Answer 2

If your camera needs access to the IsTriggerLockCamera then dependency injection is good way to make it clear :

class Camera{
    private readonly IsTriggerLockCamera _locker;
    public Camera(IsTriggerLockCamera locker){
       if (locker== null)
       {
           throw new ArgumentNullException("locker");
       }
       _locker = locker;
    }
    public void whatevermethod(){
        if (_locker.CameraLock){
           ...
        } 
    }
}

Answer 3

You need to set the variable you want to access from other scripts, static as well as public.

using UnityEngine;
using System.Collections;

public class IsTriggerLockCamera : MonoBehaviour {
public static bool CameraLock = false;

public void OnTriggerStay2D(Collider2D other) {
    CameraLock = true;
    Debug.Log ("Im inside"); 

}

    public void OnTriggerExit2D(Collider2D other) {
    CameraLock = false;
    Debug.Log ("I exited");
}

}

Then you can access CameraLock :

if (CameraLock == true) {
        Debug.Log ("Im locked");
    }

Answer 4

I would like to suggest some approach,

1. Make CameraLock variable as protected.
2. Create a new class and make IsTriggerLockCamera class as base class.
3. consume the CameraLock variable and work on it.

Thanks,

Answer 5

you could make a function that sets the bool then a function that returns it then you could put that in the file with the bool then call those functions from the other file

bool Saved
public void SetSaved(bool issaved)
{
    Saved = issaved;
}

public bool GetSaved()
{
    return Saved;
}