In this chapter, we learned how to create custom inspectors.
The CustomEditor class is part of the UnityEditor namespace and it's necessary to make a class a custom inspector. This class must inherit from the Editor class and must be nested in an Editor folder in order to work.
An inspector, such as a MonoBehaviour class, has its own message method. These events are OnEnable, OnDisable, and OnDestroy. To make changes to the GUI, you must override the method OnInspectorGUI.
There are several classes to add the GUI in the inspector: the EditorGUILayout and EditorGUI classes are similar, with the only difference being that the first one auto adapts the GUI elements based in a layout, and the second one requires the specification of a rectangle to be used as a container of the element.
There is a class called GUILayout, with generic GUI elements that can be used in a video game or editor context. The Button method is part of this class.
It's important to review the API reference of these...
