UI Button add to panel via script

Hi,

I'm trying to put button(stored as prefab) dynamically to panel.

I tried many ways, though I don't understand exactly how it should be done.

Code (CSharp):

1. public RectTransform panel;
2. public Button bt;
3. .
4. .
5. .
6. Instantiate(bt);
7. bt.transform.SetParent(panel.transform);
8.  

I always get this error:
"Setting the parent of a transform which resides in a prefab is disabled to prevent data corruption."

My question is, how to do it correctly ?

 

Solved

 

A solution for the rest of us would be appreciated.