Time for action – adding the Awake method to StateManager

In the code block of the Awake() method, we're going to check if the GameManager GameObject already exists. If it doesn't, we'll save it to a variable and tell Unity not to destroy it when any other Scene level is loaded. If it does already exist, we'll tell Unity to destroy any new GameManager GameObjects created.

Insert the new code as shown in the following steps:

1. Add a new static variable on line 9.

2. Add the Awake() method at lines 11 through 22 as shown in the following screenshot:

   

What just happened?

An analysis of the code shown in the preceding screenshot is as follows:On the StateManager class

Line 9: private static StateManager instanceRef;

• This variable named instanceRef stores a StateManager type which is a reference to the StateManager object in the memory

• This is also a static variable

• This means, that in this example, each instance of the StateManager Component object that's created will share and see the same value

• It is...