先自定义一个UITabbarController，用于Storyboard中

再在MyTabbarController中实现protocol

@interface MyTabbarController : UITabBarController

@end再实现代理里面的方法

@implementation MyTabbarController

- (BOOL)tabBarController:(UITabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController {

NSLog(@"shouldSelectViewController %@", tabBarController.selectedViewController);

if (viewController.tabBarItem.tag == 100) {

DiaryViewController *vc = [self.storyboard instantiateViewControllerWithIdentifier:DIARY_VC_ID];

[((UINavigationController *)tabBarController.selectedViewController) pushViewController:vc animated:YES];

return NO;

}

return YES;

}

- (id)initWithCoder:(NSCoder *)aDecoder {

self = [super initWithCoder:aDecoder];

if (self) {

self.delegate = self;

}

return self;

}

@end在要监听的tabbaritem跳转的viewcontroller中(比如点击一个item隐藏tabbar，而且有返回按钮)

则找到该tabbar，我的是父控件的tabbar，所以

- (void)viewWillAppear:(BOOL)animated {

self.parentViewController.tabBarController.tabBar.hidden = YES;

}点击返回按钮后回到开始所选中的tabbaritem

- (void)viewWillDisappear:(BOOL)animated {

self.parentViewController.tabBarController.tabBar.hidden = NO;

}

原文：http://blog.csdn.net/fanxiaoxuan1234/article/details/41721635