参考文献：
https://docs.angularjs.org/guide/directive
http://damoqiongqiu.iteye.com/blog/1917971
http://my.oschina.net/u/1992917/blog/406421
原文链接：https://www.f2er.com/angularjs/149153.html
参考文献：
https://docs.angularjs.org/guide/directive
http://damoqiongqiu.iteye.com/blog/1917971
http://my.oschina.net/u/1992917/blog/406421
原文链接：https://www.f2er.com/angularjs/149153.html