How do you wait for key press before a game starts?

Question

Hi! I have a script that will show a UI and wait for the player to press the "S" key. Once that key is pressed it will enable the player and hide the UI. I am having problems with the function "Start". Any help would be appreciated.

Here is the script:

 using UnityEngine;
 using System.Collections;
 
 public class WaitForPlayer : MonoBehaviour {
     public GameObject waitScreen;
     public GameObject mainPlayer;
     // Use this for initialization
     void Start () {
         waitScreen.SetActive = (true);
         mainPlayer.SetActive = (false);
     }
 
     void Update (){
 
         function Start () {
             while (true) {
                 while (!Input.GetKeyDown(KeyCode.S)) yield;
                 waitScreen.SetActive = (false); yield;
                 mainPlayer.SetActive = (true); yield;
             }
         }
     }

,

Answer 1

There are several problems here with your WaitForPlayer class.

You are attempting to embed a function within a function.
You are attempting to embed a function Unityscript within a C# function (you can not have JS and C# in the same script).
Start() is a MonoBehaviour function that is called on the frame when a script is enabled just before any of the Update methods is called the first time, you are attempting to create a second Start() function that is embedded into the Update() function and make it a co-routine at the same time (neither Update() or Start() can be co-routines).

You do not need to use co-routines to accomplish what you want. This should do what you are trying to do - Here is the updated and tested script

 using UnityEngine;
 using System.Collections;
 
 public class WaitForPlayer : MonoBehaviour
 {
     public GameObject waitScreen;
     public GameObject mainPlayer;
     
     // flag to determine if we are waiting for uset input to start game
     private bool waitingToStartGame = true;
 
     // Use this for initialization
     void Start ()
     {
         if (waitScreen != null)
         {
             waitScreen.SetActive(true);
         }
         else
         {
             waitingToStartGame = false;
             Debug.LogError("waitScreen was not set in the inspector. Please set and try again");
         }
         if (mainPlayer != null)
         {
             mainPlayer.SetActive(false);
         }
         else
         {
             Debug.LogError("mainPlayer was not set in the inspector. Please set and try again");
         }
     }
 
     void Update ()
     {
         // if the waitingToStartGame is enabled and the 'S' key has been pressed
         if (waitingToStartGame && (Input.GetKeyDown(KeyCode.S)))
         {
             // set the flag to false so that will no longer be checking for input to start game
             waitingToStartGame = false;
             if (waitScreen != null)
             {
                 waitScreen.SetActive(false);
             }
             if (mainPlayer != null)
             {
                 mainPlayer.SetActive(true);
             }
         }
     }
 }

Answer 2

Answer by Eviseek · Oct 21, 2017 at 04:46 PM

Hello, I am just doing the same. Could someone tell me, what should I set in Inspector for GameObject waitScreen? Thanks a lot.

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How do you wait for key press before a game starts?

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