UnityEditor中新建一个窗口，在Hierarchy中点击一个GameObject时，窗口中就显示相应的GameObject名称和Position

bool showPosition = true;
    string status = "Select a GameObject";
    [MenuItem("Examples/FoldOut Usage")]
    static void Init(){
        GoogleEditor window = EditorWindow.GetWindow (typeof(GoogleEditor), true, "GoogleWindow") as GoogleEditor;
        window.Show ();
    }
    void OnGUI(){
        showPosition = EditorGUILayout.Foldout (showPosition, status);
        if (showPosition) {
            if(Selection.activeTransform){
                Selection.activeTransform.position = EditorGUILayout.Vector3Field("Position",
                                                                                  Selection.activeTransform.position);
                status = Selection.activeTransform.name;
            }
        }
        if (!Selection.activeTransform) {
            status = "Select a GameObject";
            showPosition = false;
        }
    }
    void OnInspectorUpdate(){
        this.Repaint ();

    }

说明：

1.showPosition ＝ EditorGUILayout.Foldout (showPosition, status);中showPosition是表示是不是把目录展开，status表示目录顶端的名字，

2.OnInspectorUpdate中要this.Repaint ();否则window中的名字不会立马显示