button

---

UnityAction, no return parameter

https://docs.unity3d.com/2019.4/Documentation/ScriptReference/UIElements.Button.html (opens new window)

functions

functions	parameter	describe
AddBtnEvent(Button, UnityAction)	Button:UnityEngine.UI.Button	button add click event
RemoveBtnEvent(Button,UnityAction)	Button:UnityEngine.UI.Button	button remove click event
RemoveBtnAllEvent(Button)	Button:UnityEngine.UI.Button	Removes all button events for the specified object
transform:AddBtnEvent(string,UnityAction)	string:Name of child to be found.
transform:RemoveAllBtnEvent(string)	string: Name of child to be found.
transform:RemoveAllBtnEvent(Transform)	Transform：button.transform
transform:RemoveAllBtnEvent(GameObject)	GameObject：button.gameObject

example

🎉 💯

this is lua code

--add button click event--
---example1----
transform:AddBtnEvent("bg/btnYes",onClickYes);
function onClickYes()
   clickyes()
   hide()  
end

local btnYes = transform:Find("bg/btnYes"):GetComponent('Button')
---example2---
AddBtnEvent(btnYes,onClickYes);
---example3----
btnYes.onClick:AddListener(onClickYes)

-----remove button click event
btnYes.onClick:RemoveAllListeners() 
RemoveBtnEvent(btnYes,onClickYes)
RemoveAllBtnEvent(btnYes)
transform:RemoveBtnEvent("bg/btnYes",onClickYes)
transform:RemoveAllBtnEvent("bg/btnYes")