CustomTabBar *tabar = (CustomTabBar*)self.tabBarController;
tabar.previousIndex = tabar.selectedIndex;
tabar.selectedIndex = INDEX_COLLECTION_BOX_VIEW_CONTROLLER;
CustomTabBar继承了uitabbarcontroller并点击了一个Buttton，执行上面的代码，但ViewController的viewWillAppear也调用了哪个索引INDEX_COLLECTION_BOX_VIEW_CONTROLLER。日志是
2014-12-03 15:15:08.724 SogalNew[4187:3180974] -[TeamViewController viewWillAppear:] [Line 63] index is:5 <br/>
2014-12-03 15:15:08.774 SogalNew[4187:3180974] -[CollectionController viewWillAppear:] [Line 88] index is:7 <br/>
和宏是：
define INDEX_CUSTOMER_DETAIL_VIEW_CONTROLLER 5
define INDEX_COLLECTION_BOX_VIEW_CONTROLLER 7
define INDEX_TEAM_VIEW_CONTROLLER 8
我点按的按钮属于索引== INDEX_CUSTOMER_DETAIL_VIEW_CONTROLLER的ViewController
我查了很久，无法解决，帮助我!!