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I have an Iphone application in which i have 3 tabitems with a tabbarcontroller.Inside the tabbarcontroller each viewcontroller is a navigation controller.when selecting the second tab i have a view controller.when selecting a button on that i am pushing another view controller to the self.navigation 控制器。在那个视图控制器中，我正在推动并像那样前进。但问题是当我再次选择 tabitem 时，pushviewcotroller 显示在那里。但是当我选择选项卡时，我再次需要那个 rootview，我试过了在我的代码中像这样但没有用，`

-(void)tabBarController:(UITabBarController *)tabbBarController didSelectViewController:(UIViewController *)viewController
{
    if(tabBarController.selectedIndex==0)
    {
        //[viewController.tabBarItem setImage:[UIImage imageNamed:@"pinboard_hvr.png"]];
    }
    else if (tabBarController.selectedIndex==1)
    {
        NSLog(@"%@",viewController);
       //[viewController.tabBarItem setImage:[UIImage imageNamed:@"pinboard_hvr.png"]];
       // NSArray *array = [viewController.navigationController viewControllers];
        NSLog(@"%@",array);

       // [self.navigationController popToViewController:[array objectAtIndex:0] animated:YES];


        [viewController.navigationController popToRootViewControllerAnimated:YES];
        //[appdelegate.navigationController popToRootViewControllerAnimated:YES];

    }
    else if (tabBarController.selectedIndex==2)
    {

        //[viewController.tabBarItem setImage:[UIImage imageNamed:@"pinboard_hvr.png"]];  

    }
}

`我已经尝试过弹出到根目录以及获取视图控制器数组，但没有成功。有人可以帮我实现这一目标吗？

4

2 回答 2

2

您在委托中收到的参数本身就是一个导航控制器。因此，更改如下声明，

else if (tabBarController.selectedIndex==1)
    {
        [((UINavigationController *)viewController) popToRootViewControllerAnimated:YES];
        //[appdelegate.navigationController popToRootViewControllerAnimated:YES];

    }
于 2012-07-13T08:50:24.330 回答
1

我也有类似的问题，我通过以下代码解决了。

-(void)tabBarController:(UITabBarController *)tabbBarController didSelectViewController:(UIViewController *)viewController
{
    else if (tabBarController.selectedIndex==1)
    {
         NSArray *mycontrollers = self.tabBarController.viewControllers;
         [[mycontrollers objectAtIndex:1] popToRootViewControllerAnimated:NO];
         mycontrollers = nil;
    }

}

希望这对您有所帮助。

于 2012-07-13T08:57:13.580 回答