提供Tab页的窗口视图容器，它有俩个children，一组是用户可以选择指定Tab页的标签，另一组是fr a meLayout用来显示该Tab页的内容。个别元素通常控制使用这个容器对象，而不是设置在子元素本身的值。-Tab page window view of the container, it has both children, a group of users can choose to specify Tab page label, another group fr a meLayout used to display the contents of the Tab page. Individual elements usually controlled using this container object, instead of setting the value of the sub-element itself.