Question

我一直在按照本教程设置带有故事板的桌面视图。

一切正常，除了在本教程开始时他以tabBarView模板开始，并在其中嵌入了UINavigationControl。

所以这是他提出的代码 - 有效：

    UITabBarController *tabBarController = 
(UITabBarController *)self.window.rootViewController;

UINavigationController *navigationController = 
[[tabBarController viewControllers] objectAtIndex:0];

AlbumViewController *albumsViewController = 
[[navigationController viewControllers] objectAtIndex:0];
albumsViewController.albums = albums;

以下是：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:      (NSDictionary *)launchOptions
{
albums = [NSMutableArray arrayWithCapacity:5];
Album *album1 = [[Album alloc] init];
Album *album2 = [[Album alloc] init];
Album *album3 = [[Album alloc] init];
Album *album4 = [[Album alloc] init];
Album *album5 = [[Album alloc] init];

album1.albumName = @"Graduation";
album2.albumName = @"Dark and Twisted Fantasy";
album3.albumName = @"Torches";
album4.albumName = @"Nothing But The Beat";
album5.albumName = @"Angles";

album1.artist = @"Kanye West";
album2.artist = @"Kanye West";
album3.artist = @"Foster The People";
album4.artist = @"David Guetta";
album5.artist = @"The Strokes";

album1.rating = 5;
album2.rating = 5;
album3.rating = 5;
album4.rating = 5;
album5.rating = 5;

[albums addObject:album1];
[albums addObject:album2];
[albums addObject:album3];
[albums addObject:album4];
[albums addObject:album5];

UITabBarController *tabBarController = 
(UITabBarController *)self.window.rootViewController;

UINavigationController *navigationController = 
[[tabBarController viewControllers] objectAtIndex:0];

AlbumViewController *albumsViewController = 
[[navigationController viewControllers] objectAtIndex:0];
albumsViewController.albums = albums;

// Override point for customization after application launch.
return YES;
}

这部分发布在AppDelegate.m中我真的在尝试一切，但没有任何作用。

任何帮助都会很棒： - ）

PS如果我取出tabView或注释掉第一位代码，TableView会显示，但其中没有数据。

干杯杰夫

Answer 1

UITabBarController *tabBarController = (UITabBarController *)self.window.rootViewController;

这里，代码是获取窗口的根视图控制器，它来自原始项目是一个标签栏控制器。你已经删除了这个，所以这将返回一个导航控制器。

您已从视图控制器层次结构中删除了一定程度的包含。您的根视图控制器现在是导航控制器。所以，我认为你需要的代码是：

UINavigationController *navigationController = (UINavigationController *)self.window.rootViewController;
AlbumViewController *albumsViewController = [[navigationController viewControllers] objectAtIndex:0];        
albumsViewController.albums = albums;

更改此根视图设置

1 个答案: