如何在展开的选项卡上更改手风琴标题图标?
Accordion plunke URL 是:http ://plnkr.co/edit/7HMhoHk9AWyBAHALgD0P?p=preview
<accordion-group>
<accordion-heading>
I can have markup, too! <i class="icon-check"></i>
</accordion-heading>
This is just some content to illustrate fancy headings.
</accordion-group>
</accordion>
所以基本上我想改变图标检查类让我们说图标取消检查,当标签展开时