Trying to invoke method in unity. Method cannot be called

Question

void Update()
{
    if (currentTarget != null)
    {
        this.Invoke("Shoot(currentTarget)", 0.3f);
    }
}

void Shoot(Collider currentTarget)
{
    .......
}

I want the Shoot method to be called fast. But all I get is

Trying to Invoke method: Tower.Shoot(currentTarget) couldn't be called.

What can be the problem ?

Answer 1

You cannot call Invoke with parameters. This should work if you remove the parameter from your Shoot function.

Invoke("Shoot", 3f);

Then your shoot function should look like this

void Shoot(){
}

instead of

void Shoot(string...parameter){
}

After your comment, there is another way to do this. That requires "Coroutine".

 IEnumerator Shoot(Collider currentTarget, float delayTime)
     {
         yield return new WaitForSeconds(delayTime);
         //You can then put your code below
       //......your code
     }

You cannot call it directly. For example, you cannot do this: Shoot(currentTarget, 1f);

You must use **StartCoroutine**(Shoot(currentTarget, 1f));

 void Start()
 {
    //Call your function
     StartCoroutine(Shoot(currentTarget, 1f));
 }

Also if you dont like using StartCoroutine, then you can call the Coroutine function inside another normal function. I think you may like this method so the whole code should look like something below:

 //Changed the name to **ShootIEnum**
 IEnumerator ShootIEnum(Collider currentTarget, float delayTime=0f)
     {
         yield return new WaitForSeconds(delayTime);
         //You can then put your code below
       //......your code
     }

//You call this function 
void Shoot(Collider currentTarget, float delayTime=0f)
{
 StartCoroutine(ShootIEnum(currentTarget, 1f));
}

void Update()
    {
        if (currentTarget != null)
        {
           Shoot(currentTarget,  0.3f);
        }
    }

Now, anytime you want to call Shoot, you can now call Shoot(currentTarget, 1f); with no problems.