替換詳細視圖控制器

Question

我正在使用分割視圖控制器，並在使用新視圖控制器替換我的詳細視圖控制器時出現問題。當我啓動應用程序時，我將我的空視圖控制器作爲我的詳細視圖控制器，並點擊導航欄上的按鈕以顯示主視圖控制器。當我在主視圖控制器中選擇一行時，我的詳細視圖控制器將被替換爲相應的控制器。在你第一次選擇一行時它可以正常工作，但是之後每次從主控制器中選擇一行時，主控制器都不會消失，因此它只停留在細節控制器之上。

的AppDelegate：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { 
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; 

    // Override point for customization after application launch. 

    MasterViewController *masterVC = [[MasterViewController alloc]initWithNibName:@"MasterViewController" bundle:nil]; 
    UINavigationController *masterNavController = [[UINavigationController alloc]initWithRootViewController:masterVC]; 

    DetailViewController *detailVC = [[DetailViewController alloc]initWithNibName:@"DetailViewController" bundle:nil]; 
    UINavigationController *detailNavController = [[UINavigationController alloc]initWithRootViewController:detailVC]; 

    masterVC.detailViewController = detailVC; 

    self.splitViewController = [[UISplitViewController alloc]init]; 
    self.splitViewController.delegate = detailVC; 
    self.splitViewController.viewControllers = @[masterNavController, detailNavController]; 

    self.window.rootViewController = self.splitViewController; 

    [self.window makeKeyAndVisible]; 
    return YES; 
} 

MasterViewController：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { 
    ActionAlertsViewController *rootView = [[ActionAlertsViewController alloc]initWithNibName:nil bundle:nil]; 
    AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication]delegate]; 
    NSMutableArray *details = [self.splitViewController.viewControllers mutableCopy]; 

    if (indexPath.section == 0) { 
     if (indexPath.row == 0) { 
      rootView.title = @"Action Alerts"; 
      rootView.background = [UIImage imageNamed:@"capitol"]; 
      rootView.urlString = @"http://kyfbnewsroom.com/category/public-affairs/notifications/feed/"; 
      [rootView fetchEntries]; 

      UINavigationController *detailNav = [[UINavigationController alloc]initWithRootViewController:rootView]; 

      if (details.count > 1) { 
       [details replaceObjectAtIndex:1 withObject:detailNav]; 
      } else { 
       [details insertObject:detailNav atIndex:1]; 
      } 

      appDelegate.splitViewController.viewControllers = details; 
      appDelegate.window.rootViewController = self.splitViewController; 
      appDelegate.splitViewController.delegate = rootView; 
      [appDelegate.splitViewController viewWillAppear:YES]; 
     } 
    } 
} 

Answer 1

我不知道從哪裏開始：

1. 不要複製/克隆UIViewControllers：[self.splitViewController.viewControllers mutableCopy]
2. 唐不會調用系統啓動的我ssages：[appDelegate.splitViewController viewWillAppear:YES]
3. 不要復位根視圖控制器」 appDelegate.window.rootViewController
4. 不要回去AppDelegate找出哪些查看您是
5. @beyowulf注意：你不應該調用viewWillAppear即系統調用的視圖控制器生命週期方法。你應該這樣說：[self.splitViewController showDetailViewController:detailNav sender:self]

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務必閱讀documentation並按照教程：

• Raywenderlich
• NSHipster