BCStatusItem 介绍
BCStatusItem 是 NsstatusItem 的扩展
A view and NsstatusItem category to let you easily expand the functionality of
NsstatusItem. One issue with NsstatusItem is getting it’s location/frame on
the screen. You can do this if it has a custom view, so one of the features of
BCStatusItem is to by default have a custom view that behaves like
NsstatusItem does by default.
