How do I use EditorGUIUtility.ShowObjectPicker()? C#

To act on the "events" provided by the object picker, try this somewhere in the body of your OnGUI method:

 if (Event.current.commandName == "ObjectSelectorUpdated")
 {
      // do a thing relating to the object picker
 }

Take a look at the Event class for some more info about consuming the events posted by the Object picker.

I was still not sure how you use the control ID for a picker window. Here is what I did to get multiple object fields working with the picker.

Use the following code to open up a picker window with a specific control ID.

 //in your EditorWindow class
 
 int currentPickerWindow;
 
 void ShowPicker() {
     //create a window picker control ID
     currentPickerWindow = EditorGUIUtility.GetControlID(FocusType.Passive) + 100;
 
     //use the ID you just created
     EditorGUIUtility.ShowObjectPicker<GameObject>(null,false,"ee",currentPickerWindow);
 }

Then, in your method that draws the object field check for the event commandname "ObjectSelectorUpdated" and check if the open picker has your custom controlID. EditorGUIUtility.GetObjectPickerObject() should be the picker object you want.

 Object effectGO = null;
 
 if( Event.current.commandName == "ObjectSelectorUpdated" && EditorGUIUtility.GetObjectPickerControlID() == currentPickerWindow )
 {        
     
     effectGO = EditorGUIUtility.GetObjectPickerObject();
     currentPickerWindow = -1;
 
     //name of selected object from picker
     Debug.Log(effectGO.name);
 }

This really pissed me off. That goddamn showobjectpicker.

Anyways, I found a script from some Japanese place that works. He basically made it looked at normal objects. I only changed it to Texture2D.

So if you check here and just change the Object texts to Texture2D. It'll work.

http://anchan828.hatenablog.jp/entry/2013/11/15/143139