Question

I’m new to iOS and Objective-C. I have an application that displays a table view, and opens a new view when click the user clicks on a row.

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {  
    [tableView deselectRowAtIndexPath:indexPath animated:YES];
    DetailViewController *detailController = [[DetailViewController alloc] initWithNibName:@"DetailView" bundle:nil];
    [detailController changeSubjectText:[subject_data_Array objectAtIndex:indexPath.row]];

    //navigationController = [[UINavigationController alloc] initWithRootViewController:detailController];

    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    [self.window addSubview:navigationController.view];
    [self.window makeKeyAndVisible];
}

In my detail view I have coded:

-(IBAction)closeDetail:(id)sender {
    NSLog(@"closeDetail");
    [self.view removeFromSuperview];
}

But it’s not working. Can anyone help?

---

Can anyone help me?

how i can close view?

download my code in –> http://www.vasuta.com/ios/multiview2.zip

open build and run click one row in “Bulletin Board” DetailView it’s open click Close …..

why DetailView is not full screen and why can’t close detail view?

i open it wrong or i close it wrong

help me please

didSelectRowAtIndexPath you can see in “GadgetBulletinsTVContoller.m” and close command you can see in “DetailViewController.m”

Thank you very much

ps. sorry for my english skill 🙁

Answer 1

Why are you creating that window object and why are you trying to add your subview to it?
if you want to add a subview you should add it to the parent, the tableview or the parent of the tableView.

a better idea would be to push a new view controller on the stack that would display the info you want to show.

Here is a tutorial that shows how to push a new view controller when selecting a cell in a tableview tutorial link .

EDIT:
in MultipleAppDelegate – (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions should look like below:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    self.viewController = [[MultipleViewController alloc] initWithNibName:@"MultipleViewController" bundle:nil];
    UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:self.viewController];
    navController.navigationBarHidden = YES;
    self.window.rootViewController = navController;

    [self.window makeKeyAndVisible];
    return YES;
}

In GadgetBulletinsTVContoller.h declare a protocol like below:

@protocol GadgetBulletinsTVControllerDelegate <NSObject>
@optional
- (void)showItemDetails:(id)selectedItem;

@end

and a delegate property:

@property (nonatomic, assign)id<GadgetBulletinsTVControllerDelegate>delegate;

In GadgetBulletinsTVContoller.m synthesize the delegate.
– (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
should look like this:

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath 
{   
    [tableView deselectRowAtIndexPath:indexPath animated:YES];

    if([delegate respondsToSelector:@selector(showItemDetails:)])
    {
        [delegate showItemDetails:[subject_data_Array objectAtIndex:indexPath.row]];
    }
}

In FirstViewController.m tell the controller to implement the GadgetBulletinsTVControllerDelegate like this:

    @interface FirstViewController ()<GadgetBulletinsTVControllerDelegate>

in viewDidLoad method tell the gadgetBulletinsController that his delegate is the FirstViewController class, like this:

if (gadgetBulletinsContoller == nil) {
        gadgetBulletinsContoller = [[GadgetBulletinsTVContoller alloc] init];
        gadgetBulletinsContoller.delegate = self;
    }  

and implement the GadgetBulletinsTVControllerDelegate’s methods:

- (void)showItemDetails:(id)selectedItem
{
    if([delegate respondsToSelector:@selector(showDetailsScreenForItem:)])
    {
        [delegate showDetailsScreenForItem:selectedItem];
    }
}

In FirstViewController.h declare a protocol like below:

@protocol FirstViewControllerDelegate <NSObject>

- (void)showDetailsScreenForItem:(id)item;

@end

and declare a delegate property like below(don’t forget to synthesize in .m file):

@property (nonatomic, assign)IBOutlet id<FirstViewControllerDelegate>delegate;

In MultipleViewController.xib select the FirstViewController screen and in outlets drag from the delegate to the fileOwner for setting the value of the delegate to the MultipleViewController(you can do this in code if you want to).

In MultipleViewController.m tell the MultipleViewController to implement the FirstViewControllerDelegate protocol like below:

@interface MultipleViewController ()<FirstViewControllerDelegate>

and implement the protocol method:

- (void)showDetailsScreenForItem:(id)item
{
    DetailViewController *detailController = [[DetailViewController alloc] initWithNibName:@"DetailView" bundle:nil];
    [detailController changeSubjectText:item];
    [self.navigationController pushViewController:detailController animated:YES];
}

In DetailViewController modify the closeDetail method to look like this:

- (IBAction)closeDetail:(id)sender {
    NSLog(@"closeDetail");
    [self.navigationController popViewControllerAnimated:YES];
}

and voila, Your GadgetBulletinsTVController items details are pushed. You need to do the same steps for the other controllers from where you want to show details.