Pass Class as parameter to be added as addcomponent<T> where T is parameter Class

Unity Engine
1

Hey need some help.
Been stuck on this for hours.
Few answers found are for obsolete methods or don’t work.

I am writing an ui helper and have a method that creates Text gameobjects and I want to be able to pass ui Scripts, classes, as a variable to add to the Text gameobject with .addcomponent()

  1. How do you setup a class, to be used as component, as parameter in a method:
void myMethod(<class as parameter?>)
{
  ..
}
  1. How do I use the argument as T:
 exampleobj.addcomponont<parameter argument>();
1 Like
2

I don’t have documentation in front of me, but it looks something like this:

public class Whatever <Type>{

    private void myMethod(Type objectName){

    }

}

Then you can do this…

Whatever<Jerry> blablabla = new Whatever<Jerry>();

Jerry jerry = new Jerry();

blablabla.myMethod(jerry);

I hope that answers your questions

3

AddComponent also has a non-generic version. you can write your method as a generic or as a function that accepts a Type as the parameter, or both if you want to cover your bases.

This is an Extension method I made a while back Requires a component variable to be set. If its not it’ll add and cache that variable.

        public static T RequireComponent<T>  (this UnityEngine.Component  source, ref T component)
            where T:UnityEngine.Component
        {
            if(!source) 
                throw new System.ArgumentNullException("source", "The component from where you are calling this extension method is null, cannot ensure component is set");

            var componentType = typeof(T);
            if(!component) component = (T)source.GetComponent(componentType);
            if(!component) component = (T)source.gameObject.AddComponent(componentType);

            return component;
        }

you can then use it as so:

private Image myImage;

...

this.RequireComponent<Image>(ref myImage).color = Color.white;