具有多个详细视图的 UISplitView（带有 Storyboard）

我一直在尝试使用创建此代码的版本故事板 https://developer.apple.com/library/ios/samplecode/MultipleDetailViews/Introduction/Intro.html:

我希望能够根据导航表中选择的单元格在两个不同的详细视图之间切换。我尝试通过创建一个具有自定义 setter 方法的 SplitViewManager 来实现此目的，该方法在每次选择不同的单元格时交换详细视图。这与 Apple 的示例代码使用的方法相同。 SplitViewManager 跟随委托。

我认为我的问题是我没有将 splitViewController.delegate 连接到任何东西，所以我也无法将 splitViewManager 分配给任何东西。但我不知道我什至无法在故事板中将代表连接到什么。请让我知道我是否是个白痴（几乎肯定是）。谢谢！

我的代码如下：

DFM AppDelegate.m：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.splitViewController = (UISplitViewController *)self.window.rootViewController;
    self.splitViewManager = (DFMSplitViewManager *)self.splitViewController.delegate;

    NSLog(@"split view controller: %@", self.splitViewController); // not null
    NSLog(@"split view controller delegate: %@", self.splitViewController.delegate); // is null
    NSLog(@"split view manager: %@", self.splitViewManager); // is null.

    // But i'm not sure how to assign splitViewController.delegate or splitViewManager in the storyboard.

    return YES;
}

DFMSplitViewManager.m：

- (void)setDetailViewController:(UIViewController<SubstitutableDetailViewController> *)detailViewController
{
    self.detailViewController = detailViewController;

    // Update the split view controller's view controllers array.
    // This causes the new detail view controller to be displayed.
    UIViewController *navigationViewController = [self.splitViewController.viewControllers objectAtIndex:0];
    NSArray *viewControllers = [[NSArray alloc] initWithObjects:navigationViewController, self.detailViewController, nil];
    self.splitViewController.viewControllers = viewControllers;
}

DFMMasterViewController.m：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    DFMAppDelegate *appDelegate = (DFMAppDelegate *)[[UIApplication sharedApplication] delegate];

    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];

    if (indexPath.row == 0) {
        NSLog(@"clicked cell 1");

        DFMDetailViewController *detailViewController = [storyboard instantiateViewControllerWithIdentifier:@"ViewController"];

        [appDelegate.splitViewManager setDetailViewController:detailViewController];

    }
    else {
        NSLog(@"clicked cell 2");

        DFMDetailCollectionViewController *detailCollectionViewController = [storyboard instantiateViewControllerWithIdentifier:@"CollectionViewController"];

        [appDelegate.splitViewManager setDetailViewController:detailCollectionViewController];
    }
}

事实证明，您可以使用界面生成器将 NSObject 添加到视图控制器。完成此操作后，我将 NSObject 的类更改为 DFMSplitViewManager，将其设置为 SplitViewController 的委托，从那里开始就非常简单了。