Check if it's the first time running the game?

Question

Hi all!

Feel like I'm here way too often at the moment, but here's today's question!! :P I have a script that changes some in game variables at start based on when the game was LAST run. This is all working fantastically with the one exception that if it is the first time the player is starting the game, it will insta kill them and trap them in that state no matter how many times the game has been rebooted.

My method for getting around this was a first run check, an int that defaults to true but can be disabled by checking the playerprefs. If it's first time true, it skips the game state changes, and if it's false it runs through them all.

So my method of doing this is as follows:

 void start ()
 {
 firstRun = PlayerPrefs.GetInt("savedFirstRun");
 if firstRun = 0
 {
 int firstRun = 1;
 }
 else
 Do lots of game save loading
 
 }

So the logic is, if it's the first run, change the variable in future to false for first run. If it's already false, go to game loading. However it spits out this error

 Assets/DataMaster.cs(20,9): error CS0135: `firstRun' conflicts with a declaration in a child block

I've tried googling this and while I can take a guess what it means I don't truly understand the issue or have any idea how to fix it. If someone could clue me in or provide a solution it would be much appreciated

Answer 1

Best Answer

Answer by BerggreenDK · Sep 29, 2011 at 11:11 AM

Just place the variable OUTSIDE the functions/events, as a class variable

 int firstRun = 0; // variable inside the class, but not inside a function.
 
 void start ()
 {
   firstRun = PlayerPrefs.GetInt("savedFirstRun") ;
 
 
 if (firstRun == 0) // remember "==" for comparing, not "=" which assigns value
 {
   firstRun = 1;
 }
 else
 { 
    //Do lots of game save loading
 
 }

}

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CrowdedWorlds · Sep 29, 2011 at 01:38 PM 1

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This solved it, thank you BerggreenDK :D == was the major killer here, thanks for the reminder. Operators seem to escape my brain way too often :P

alone1992 · Feb 03, 2014 at 06:09 PM 0

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thanks that is really nice notice

TX Manager · Mar 30, 2016 at 05:07 PM 0

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I've only one problem, how do I know how many times did the user opened the game?

Answer 2

Answer by ShadowVipers · May 17, 2019 at 08:39 PM

Instead, you should do this:

 if(PlayerPrefs.HasKey(<OneOfYourKeys>))
 {
        LoadDataMethod();
 }

which doesn't waste any space storing a 1 time use variable.

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Check if it's the first time running the game?

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