NavigationController与TabBarController同时存在时self.tabBarItem.title = @"xxx"设置失效以及‘ selectedImage’

在storyboard中一个视图中既有NavigationController又有TabBarController，设置self.title会两个地方都同时设置，想使tabBarItem标题与导航栏标题不一样时可以设置：

//    UITabBar *tabBar = self.navigationController.tabBarController.tabBar;    UITabBar *tabBar = self.tabBarController.tabBar;    UITabBarItem *targetTabBarItem = [[tabBar items] objectAtIndex:1];    targetTabBarItem.title = @"123";

另外还有一个问题，就是tabBarItem的selectedImage，这个虽然在storyboard中可以设置，但是我测试不能显示，不晓得是不是我的问题，在stackoverflow上看到的方法摘录如下：

You can use storyboard to set selected image of tabbar. I tried and it worked for me. Select the UITabbarItem and add a run-time attribute 'selectedImage', select Type as 'Image' and give the name of your image as its value.

I am using XCode 6.0 and my minimum deployment target is iOS 8.0.

参考资料：1.http://stackoverflow.com/questions/21386101/setting-selected-image-in-tab-bar-controller-with-storyboard

2.http://www.it165.net/pro/html/201312/8363.html