UISplitView with Multiple Detail Views (with Storyboard)

Question

I've been trying to create a version of this code using a storyboard:

I want to be able to switch between two different detail views, depending on the cell selected in the navigation table. I've tried to implement this by creating a SplitViewManager with a custom setter method that swaps out the detail views each time a different cell is selected. This is the same approach that Apple's sample code uses. The SplitViewManager follows the delegate.

I think my issue is that I haven't connected my splitViewController.delegate to anything, so I can't assign the splitViewManager to anything either. But I can't figure out what I would even connect the delegate to in the storyboard. Please let me know if I'm being an idiot here (almost definitely). Thanks!

My code is below:

DFMAppDelegate.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];
    }
}

Answer 1

Turns out you can use the interface builder to add NSObjects to View Controllers. Once I did that, I changed the NSObject's class to DFMSplitViewManager, set it as the SplitViewController's delegate, and it was pretty straight forward from there.

Answer 2

I am facing exactly the same problem as yours. Don't know wether you find out the solution or not, here is the solution I found.

Use following code in your AppDelegate.m

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 
{    
    // Override point for customization after application launch.
    UISplitViewController *splitViewController = (UISplitViewController *)self.window.rootViewController;

    self.detailViewManager = [[DetailViewManager alloc] init];
    self.detailViewManager.splitViewController = splitViewController;
    self.detailViewManager.detailViewController = splitViewController.viewControllers.lastObject;
    splitViewController.delegate = self.detailViewManager;

    if ([splitViewController respondsToSelector:@selector(setPresentsWithGesture:)])
    [splitViewController setPresentsWithGesture:YES];

    return YES;
}  

The rest of code is the same as what Apple has provided.

Basically, self.detailViewManager is our split view controller, when you select cell in table, self.detailViewManager will reset the detail view (if I'm not wrong). I'm new to Xcode, so anyone please correct me if I'm wrong.

Here is the solution link, answered by hallmark.