EditorWindow.OnSelectionChange 当选择改变

// Simple example that lets you save the current selection and load it.
//让你保持当前选择并加载它
class SelectionChange extends EditorWindow {
	var selectionIDs : int[];
	@MenuItem("Example/Selection Saver")
	static function Init() {
		var window = GetWindow(SelectionChange);
		window.Show();
	}
	function OnGUI() {
		if(GUILayout.Button("Save"))
			SaveSelection();
		if(GUILayout.Button("Load"))
			LoadLastSavedSelection();
	}
	function OnSelectionChange() {
		selectionIDs = Selection.instanceIDs;
	}
	function SaveSelection() {
		var saveStr = "";
		for(var i : int in selectionIDs)
		saveStr += i.ToString() + ";";
		saveStr = saveStr.TrimEnd(char.Parse(";"));
		EditorPrefs.SetString("SelectedIDs",saveStr);
	}
	function LoadLastSavedSelection() {
		var strIDs : String[] = EditorPrefs.GetString("SelectedIDs").Split(char.Parse(";"));

		var ids : int[] = new int[strIDs.Length];
		for(var i = 0; i < strIDs.Length; i++)
			ids[i] = parseInt(strIDs[i]);
		Selection.instanceIDs = ids;
	}
}