So I have a prefab which is Instantiated in run time, to that prefab I create and add another game object with components Image as a child. Now here how can I add a custom class data as component to the newly created child of prefab?
To be able to add your custom script to the game object on the scene, this custom script must be inherited from
MonoBehaviour. After that, you can add your class do game object in the inspector (by clicking
Add Component button, see image below) or from code by calling