How to execute code every x seconds in unity?

Question

So I have a flashlight battery script I created and I need to know how do you make the battery variable go down every few seconds(whatever time you set.) I tried InvokeRepeating but it was an absolute disaster (The battery variable just went down really fast and ignored my script). Anyways this is the code I have:

void Update ()
{
    if (light == false) {
        battery+=0;
    }
    if (light == true) {
        battery--;//This is what I want to have every few seconds
    }

    if (battery == 0) {
        myLight.enabled = false;
        light =false;
        battery++;
        InvokeRepeating("invoke", 1, 0.01F);
    }
}

void invoke(){
    light = false;
    myLight.enabled = false;
}

This question is actually about how to fix your code, I think it's a poor question. Also, in the future, please only include the code related to the problem in your question. — House
– House, Commented Nov 30, 2014 at 1:37

Chris McFarland · Accepted Answer · 2014-11-30 01:25:57Z

You're on the right track with InvokeRepeating. However, three issues:

You're currently calling your invoke method every .01 seconds.
Your invoke method disables your myLight component, rather than decreasing battery.
Your invoke method is a very confusing name.

I'm not sure you're calling InvokeRepeating in a good spot, but I'll let you test that :)

I'd suggest changing your invoke method to something like this:

void DecreaseBattery(){
    battery--;
}

Then edit your InvokeRepeating call:

InvokeRepeating("DecreaseBattery", 30f, 30f);

This will invoke DecreaseBattery after 30 seconds, and then every 30 seconds thereafter.

If you ever need to cancel or restart the InvokeRepeating call, you may want to use CancelInvoke(); somewhere to ensure multiple repeats don't overlap.

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