小编Gas*_*aze的帖子

我在使用导航堆栈推送视图时遇到了一些问题.

我遇到的问题是,在触摸标签栏项后,视图控制器被推入导航堆栈(来自名为FirstViewController的视图控制器),如下所示:

- (void)viewDidLoad
{
    [super viewDidLoad];
    svc = [[SecondViewController alloc] init];
    [self.navigationController pushViewController:svc animated:YES];
}

这可以按预期工作,但是当再次触摸相同的标签栏项时会出现实际问题.

当发生这种情况时,当前视图(之前推送的SecondViewController)被删除,就像我将触摸"完成"按钮一样.

我无法追踪发生的地点或原因.

编辑:这是我设置标签栏,查看控制器和导航的方式:

@implementation AppDelegate
@synthesize HomeViewController, FirstViewController, SecondViewController,     ThirdViewController, SettingsViewController, tabBarController, window;

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // Override point for customization after application launch.
    FirstViewController *firstViewController = [[FirstViewController alloc]
                                            initWithNibName:nil bundle:nil];
    UINavigationController *firstViewControllerNav = [[UINavigationController alloc]
                                      initWithRootViewController:firstViewController];

    SecondViewController *secondViewController = [[SecondViewController alloc]
                                             initWithNibName:nil bundle:nil];
    UINavigationController *secondViewControllerNav = [[UINavigationController alloc]
                                                      initWithRootViewController:secondViewController];

    ThirdViewController *thirdViewController = [[ThirdViewController alloc]
                                                  initWithNibName:nil bundle:nil];
    UINavigationController *thirdViewControllerNav = …