ios代码覆盖率

参考：

唯品会：http://blog.itpub.net/69900365/viewspace-2636946/

https://testerhome.com/topics/8468

https://testerhome.com/topics/6644

https://www.open-open.com/lib/view/open1417661077558.html#_labelTop

https://blog.csdn.net/pengyuan_D/article/details/78918898

https://testerhome.com/topics/19375

ios沙盒：https://www.jianshu.com/p/9087c3eda280