Create a new event for Button UI using script.

Questions & Answers
1

Hey!
This is maybe a simple question but i want to know how, when creating a new Button UI prefab, to create an event which will run a specific function in the player script that need the text in the text component of the child of the button. That it, sorry for bad english. Remember: if you don’t understand tell me.

2

You can use lambda expressions:

 public class Test : MonoBehaviour
 {
     public Button button; // prefab goes here
     public void Start() {
         Button newButton = Instantiate(button);
         Text text = button.GetComponentInChildren<Text>();//Or any other way to find Text component
         newButton.onClick.AddListener(()=>{Text txt = text; SomeMethod(txt);});
     }
     public void SomeMethod(Text text) {
         Debug.Log("Button clicked! Its text is "+text.text);
     }
 }

Note: part ()=>{Text txt = text; SomeMethod(text);} is the magic here, it’s declaration of anonymous method (a.k.a. lambda expression) which means:

() - no arguments

=> should do

{…} operations to do. Last statement is returned as return value (in this case, void).

Note: because of how Unity compiler works, without “Text txt = text;” part incorrect behaviour is possible.