UISplitViewController - detailView is not showing - ios

Question

In AppDelegate we create an DetailView, then a loginView is presented (UIModalPresentationFullScreen) on top of it. After logged in, loginView is dismissed.
DetailView is having a tableView and when you select a cell/row and 2nd detailView is pushed.
What I did so far:
In AppDelegate I ask for UI_USER_INTERFACE_IDIOM() and when idiom is iPad i create a splitView:
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
{
FirstDetailViewController* fdvc = [[FirstDetailViewController alloc] initWithNibName:#"FirstDetailViewController" bundle:nil];
SecondDetailViewController* sdvc = [[SecondDetailViewController alloc] initWithNibName:#"SecondDetailViewController" bundle:nil];
UINavigationController* fdvcNavigationController = [[UINavigationController alloc] initWithRootViewController:fdvc];
UINavigationController* sdvcNavigationController = [[UINavigationController alloc] initWithRootViewController:sdvc];
splitViewController = [[UISplitViewController alloc] init];
splitViewController.viewControllers = [NSArray arrayWithObjects:fdvcNavigationController, sdvcNavigationController, nil];
After login my LoginView is dismissed and my UISplitViewController is shown, with the 1st DetailView on the left side (master). So everything went fine here.
Now I go to the FirstDetailViewController.m and search for the didSelectRowAtIndexPath because there I find the pushView to SecondDetailViewController in the "iPhone version".
And here is where i am stuck. I have tried several SplitView tutorials and read problems of others regarding splitview.
But I think my problem is some kind of "basic" because I am new to programming / iOS in general and don't know all my tools.
Any help would be appreciated.

Answer 1

When writing apps with a table view and some other sort of "display" view for items in the table, I do this so it works on both devices:
// In App Delegate...
-(BOOL) application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Create views
MyTableViewController* myTable = [[MyTableViewController alloc] init];
MyDetailViewController* myDetail = [[MyDetailViewController alloc] init];
UINavigationController* tableNav = [[UINavigationController alloc] initWithRootViewController:myTable];
UINavigationController* detailNav = [[UINavigationController alloc] initWithRootViewController:myDetail];
// Check device type
if ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPad) {
// Use a split view
UISplitViewController* splitView = [[UISplitViewController alloc] init];
split.viewControllers = #[tableNav, detailNav];
self.window.rootViewController = split;
} else {
// Use a single view for iPhone
self.window.rootViewController = tableNav;
}
}
.
// In table view
-(void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
// Check device type
if ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPad) {
// Tell the already visible detail view to load something
MyData* data = ...; \\ Get your thing to display however you want
[[NSNotificationCenter defaultCenter] postNotificationName:#"DisplayMyData" object:data];
} else {
// No detail controller exists yet, so create it
MyDetailViewController* myDetail = [[MyDetailViewController alloc] init];
[self.navigationController pushViewController:myDetail animated:YES];
[[NSNotificationCenter defaultCenter] postNotificationName:#"DisplayMyData" object:data];
}
}
.
// In detail view
-(void) viewDidLoad {
[super viewDidLoad];
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(displayData:) name:#"DisplayMyData" object:nil];
}
-(void) displayData:(NSNotification*)notify {
MyData* data = (MyData*) notify.object;
... // Display however...
}