编辑器显示自定义数据结构

　　GUI/GUILayout/EditorGUILayout这几个类中没有提供自定义数据结构的显示，难道就不能像Inspector那样友好么，不然就只能使用基础元素来组合实现了。

　　不赘述，代码如下：

public class TestClass
{
    public int value;
    public string name = "";
}

public class TestEditor : EditorWindow
{
    public static TestEditor window = null;

    [MenuItem("Test/MyEditor &t")]
    public static void ShowWindow()
    {
        window = EditorWindow.GetWindow(typeof(TestEditor), false, "TestEditor") as TestEditor;
    }

    private List<TestClass> lst = new List<TestClass>();
    private bool showFoldout = true;
    private Vector2 scrollPosition = Vector2.zero;

    int count
    {
        get { return lst.Count; }
        set
        {
            if(value < lst.Count)
            {
                lst.RemoveRange(value, lst.Count - value);
            }
            else if(value > lst.Count)
            {
                for(int i = 0; i < value; ++i)
                {
                    lst.Add(new TestClass());
                }
            }
        }
    }

    void OnGUI()
    {
        GUILayout.BeginArea(new Rect(0, 0, Screen.width, Screen.height), "", "box");
        GUILayout.BeginVertical("box");
        scrollPosition = GUILayout.BeginScrollView(scrollPosition, "box");      // 创建自适应滚动条

        // 创建折叠标签
        showFoldout = EditorGUILayout.Foldout(showFoldout, "Array");
        if (showFoldout)
        {
            GUILayout.BeginHorizontal();
            GUILayout.Label("count", GUILayout.Width(50));
            count = System.Convert.ToInt32(GUILayout.TextField(count.ToString()));
            GUILayout.EndHorizontal();

            // 逐行显示数据
            for (int i = 0; i < count; ++i)
            {
                GUILayout.BeginHorizontal();

                GUILayout.Label("name", GUILayout.Width(50));
                lst[i].name = GUILayout.TextField(lst[i].name);

                GUILayout.Label("value", GUILayout.Width(50));
                lst[i].value = System.Convert.ToInt32(GUILayout.TextField(lst[i].value.ToString()));

                GUILayout.EndHorizontal();
            }
        }

        GUILayout.EndVertical();
        GUILayout.EndScrollView();
        GUILayout.EndArea();
    }

}

　　上述代码在自定义编辑器中显示了自定义结构TestClass的列表，效果如下所示：

　　有个小细节值得一提，TestClass.name一定要初始化为""，不然现实会报错。