如何使用动态布局变量在ALV中显示itab？

DATA: lo_layout TYPE REF TO cl_salv_layout,
      lo_container TYPE REF TO cl_gui_custom_container,
      lo_alv TYPE REF TO cl_salv_table,
      lt_fieldcat TYPE lvc_t_fcat,
      lt_data TYPE TABLE OF your_structure,
      ls_data TYPE your_structure.

* 创建动态布局变量
lo_layout = cl_salv_layout=>create( ).

* 创建容器对象
lo_container = new cl_gui_custom_container( container_name = 'CONTAINER' ).

* 创建ALV表格对象
lo_alv = new cl_salv_table( parent = lo_container ).

* 创建字段目录对象
lt_fieldcat = lo_alv->get_columns( ).

* 定义表格的列结构
APPEND INITIAL LINE TO lt_fieldcat ASSIGNING FIELD-SYMBOL(<fs_fieldcat>).
<fs_fieldcat>-fieldname = 'FIELD1'.
<fs_fieldcat>-ref_table = 'YOUR_TABLE'.
<fs_fieldcat>-ref_field = 'FIELD1'.

* 关联字段目录对象和表格对象
lo_alv->set_table_for_first_display( EXPORTING is_layout = lo_layout
                                      CHANGING it_outtab = lt_data
                                      it_fieldcatalog = lt_fieldcat ).

* 填充数据
LOOP AT itab INTO ls_data.
  APPEND ls_data TO lt_data.
ENDLOOP.

* 关联数据对象和表格对象
lo_alv->set_data( lt_data ).

* 将表格对象添加到动态布局变量
lo_layout->add_alv( lo_alv ).

* 显示动态布局变量
lo_layout->display( ).