Question

我有一个UISplitViewController，UIViewController作为主，UINavigationController作为我的细节控制器（它包含一个实际的DetailsController，因为它是rootController）。

在iOS5中，在app启动时（在横向视图中保存设备），我将splitViewController的视图添加到我的窗口，但是我在splitViewController之上提供了一个loginController，如下所示：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
    // Override point for customization after application launch.

    KRMasterViewController *masterViewController = [[[KRMasterViewController alloc] initWithNibName:@"KRMasterViewController" bundle:nil] autorelease];
    UINavigationController *masterNavigationController = [[[UINavigationController alloc] initWithRootViewController:masterViewController] autorelease];

    KRDetailViewController *detailViewController = [[[KRDetailViewController alloc] initWithNibName:@"KRDetailViewController" bundle:nil] autorelease];
    UINavigationController *detailNavigationController = [[[UINavigationController alloc] initWithRootViewController:detailViewController] autorelease];

    self.splitViewController = [[[UISplitViewController alloc] init] autorelease];
    self.splitViewController.delegate = detailViewController;
    self.splitViewController.viewControllers = [NSArray arrayWithObjects:masterNavigationController, detailNavigationController, nil];
    [self.window addSubview:self.splitViewController.view];

    LoginController *controller=[[LoginController alloc]
                                        initWithNibName:@"LoginController" bundle:nil];
    [self.splitViewController presentModalViewController:controller animated:false];

    [self.window makeKeyAndVisible];
    return YES;
}

正如您所看到的，detailsController是我的splitViewController的委托。问题出在iOS4中，在显示loginController之前，委托方法：

- (void)splitViewController:(UISplitViewController *)splitController willHideViewController:(UIViewController *)viewController withBarButtonItem:(UIBarButtonItem *)barButtonItem 
       forPopoverController:(UIPopoverController *)popoverController

当我解除loginController委托方法时，

被调用：

- (void)splitViewController:(UISplitViewController *)splitController willShowViewController:(UIViewController *)viewController invalidatingBarButtonItem:(UIBarButtonItem *)barButtonItem

被调用。我想iOS实现的很晚，我在风景中，但在我到达detailController之前弄明白所以一切都很酷。在iOS 5中，第二种方法在我到达splitViewController时不会被调用。这意味着我在横向视图中可以看到barButtonItem。有趣的是，如果我旋转到肖像然后再回到横向，那么从那时开始就可以正确调用这些方法。以前有人经历过这个吗？任何解决方案？

Answer 1

我遇到过类似的问题。应用程序启动后，我提出登录modalVC。但是当我解雇它时，detailViewController中的BarButtonItem仍然可见。

只需使用

[self performSelector:@selector(presentLogin) withObject:nil afterDelay:0.1]

它会神奇地开始工作。

Answer 2

我最终将根控制器从导航控制器（登录时）切换到主菜单的splitview控制器：

-(void)goToLogin{
   self.rootSplitController=nil;

   UINavigationController* navController=[[UINavigationController alloc]init];
   navController.navigationBarHidden = true;
   self.rootNavController=navController;
   [navController release];

   LoginController *loginController=[[LoginController alloc]init];
   [self.rootNavController pushViewController:loginController animated:false];
   [loginController release];

   [self.window addSubview:self.rootNavController.view];
}

-(void)goToMain{
   self.rootNavController=nil;

   MasterController *masterViewController = [[[MasterController alloc] 
      initWithNibName:@"MasterController" bundle:nil] autorelease];
   UINavigationController *masterNavigationController = [[[UINavigationController alloc] 
      initWithRootViewController:masterViewController] autorelease];
   masterNavigationController.navigationBarHidden=true;

   DetailsController *detailViewController = [[[DetailsController alloc] 
      initWithNibName:@"DetailsController" bundle:nil] autorelease];
   UINavigationController *detailNavigationController = [[[UINavigationController alloc] 
      initWithRootViewController:detailViewController] autorelease];
   detailNavigationController.navigationBarHidden=true;

   self.rootSplitController = [[[UISplitViewController alloc] init] autorelease];
   self.rootSplitController.delegate = detailViewController;
   self.rootSplitController.viewControllers = [NSArray arrayWithObjects:
    masterNavigationController, detailNavigationController, nil];

   [self.window addSubview:self.rootSplitController.view];
}

在应用启动时的横向视图中，iOS5 SplitViewController使BarButton可见

2 个答案: