IOS How to alter an existing UI to use a new navigation controller

Question

Ok, I'm having trouble with this.

I started an Application with a UITableViewController custom class called MainView.

In interface builder I modified the view so that there is a text box and a button on top and a UITableView. Connected the data source and delegate to the MainView class, and programmed in all the code to use the text field as a search field, the button as a search trigger, and then programmed in the proper delegate methods to populate the UITableView. This works perfectly.

Now the next step was to use the

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath

method to be able to show a webview with a link related to the selected row. So reading I see that I need to add a UINavigationController to the mix ( so as to get the toolbar and navigation bar etc..).

Now I tried this: add a navigation controller from the Interface builder, and connect to the appdelegate, and an outlet

 #import @interface ComparateurAppDelegate : NSObject { UIWindow *window; UINavigationController *navigationController; } @property (nonatomic, retain) IBOutlet UIWindow *window; @property (nonatomic, retain) IBOutlet UINavigationController *navigationController; @end 

then in the implementation

 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { 
 [window addSubview:navigationController.view]; [window makeKeyAndVisible]; } 

this launches ok, same as before, and I don't have the top bar I should have. plus when I try to push a new view in it does nothing.

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    

    // Override point for customization after application launch.
    UIViewController *rootController = [[MainView alloc]init];
    navigationController = [[UINavigationController alloc]initWithRootViewController:rootController];
    [rootController release];
    window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

    [window addSubview:navigationController.view];
    [window makeKeyAndVisible];

    return YES;
}

I know the code is running because I nslog it. but nothing is happening. WebViewController.nib is the nib file I created ( empty right now) so that I populate it with a UIwebview.

My guess at this moment is that the view hierarchy is not set ok.

So I tried a few things I can't remember exactly and got the toolbar on top of the window I already have, but with all the content inaccessible ( like if the toolbar was a modal dialog and I could not use the bottom one , or like a transparent view and you could see underneath to the first window that was stacked). I also tried creating programatically the UINavigation controller in the appDelegate like so

 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { // Override point for customization after application launch. UIViewController *rootController = [[MainView alloc]init]; navigationController = [[UINavigationController alloc]initWithRootViewController:rootController]; [rootController release]; window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; [window addSubview:navigationController.view]; [window makeKeyAndVisible]; return YES; } 

And all I got is an empty UITableView for an interface, and not the MainView.nib ( whose class is set as MainView).

TL;DR: Have an app that is working, want to add detailed view, and need to modify to a UINavigationController but can't seem to find the proper way to do it.

thanks in advance and sorry for the long post.

Answer 1

Try changing this:

UIViewController *rootController = [[MainView alloc]init];

To this:

UIViewController *rootController = [[MainView alloc]initWithNibName:@"MainView" bundle:nil];