ios 导航栏标题 和 tabbar标题

原文

http://stackoverflow.com/questions/21615637/how-to-change-uiviewcontroller-title-independent-of-tabbar-item-title

经典部分：

``OC
self.navigationItem.title
= @"my title"; sets navigation bar title.

self.tabBarItem.title
= @"my title"; sets tab bar title.

self.title
= @"my title"; sets both of these.
``