How can I change till Invoke() actives?

I want to change the time when invoke activates.

for example.

Code (CSharp):

1. void Start(){
2. Invoke( "Example", 20);
3. }
4.  
5. //I would like that when for example, the player presses a key
6. //  1 extra second will be added to the countdown.
7.  
8. void Example() {
9.  
10. }

 

I wouldn't use Invoke for this. I'd use a coroutine that ticked a timer for some duration, but if a key was pressed it adds 1 second. Something like this:

Code (csharp):

1.  
2. void Start()
3. {
4.     this.StartCoroutine(this.WaitForDurationWithKeyPress(20f));
5. }
6.  
7. IEnumerator WaitForDurationWithKeyPress(float dur)
8. {
9.     while(dur > 0f)
10.     {
11.         yield return null;
12.         if(Input.GetKeyDown(KeyCode.Return)) dur += 1f;
13.         dur -= Time.deltaTime;
14.     }
15.  
16.     //do what is necessary
17. }
18.  

 

Yeah, the answer is a coroutine.