How to turn off a collider when I activate it (Basic Sword mechanic) [2D]

[Pur3]

Hey guys,

I am looking to turn off the box collider 2D of my characters weapon. Currently I have it to where: When the player left clicks, it will activate the box collider and when the player releases the left click, it turns off the box collider. I want it to where it activates it on left click and automatically turns it back off no matter what. I do have a cool down system to where the player can’t click for another second, but as of now the player can just hold down the mouse key to simply avoid the cool down.

This is all within the same script: PlayerSM

//Where player activates mouse click
void MeleeHandler () 
	{
		if (Input.GetKeyDown (KeyCode.Mouse0) && meleeCDbool == false) 
		{
			MeleeBox.SetActive (true);
			meleeCDbool = true;
		}

		if (Input.GetKeyUp (KeyCode.Mouse0)) 
		{
			MeleeBox.SetActive (false);
		}
	}
---------------------------------------------------------------------------------------------------------
//Cooldown for the attack

void Timers() 
	{
		if (meleeCDbool == true) 
		{
			meleeCD -= Time.deltaTime;

			if (meleeCD <= 0) 
			{
				meleeCDbool = false;
				meleeCD = MaxMeleeCD;
			}
		}
	}

[rmassanet]

Colliders are components, not GameObjects. Therefore, assuming MeleeBox is a Collider it should be enabled and disabled like this:
MeleeBox.enabled = false;
Additionally, I am assuming you are calling MeleeHandlers and Timers in your Update function.
If you do that, your code should work.

[OutOfRam]

My advice would be to use a co-routine here. If I understand you correctly when you click, you want the the collier to turn on then after x amount of time turn off.

 private IEnumerator MeleeHandler ()
 {
     if (Input.GetKeyDown (KeyCode.Mouse0) && meleeCDbool == false) 
     {
         MeleeBox.SetActive (true);
         meleeCDbool = true;
         yield return new WaitForSeconds(1.0f); // whatever time you want between on and off in seconds put in brackets so 1.0 would be on for 1 second then turn off 0.1 would be a tenth of a second
          MeleeBox.SetActive(false);
     }
     yield return null;
 }

This should make the collier turn off regardless of whether they hold the button or not. Just remember to make sure that you initiate the co-routine where ever you do as:

StartCoroutine("MeleeHandler"); // Rather than MeleeHandler()