Title and nav bar disappearing when launching view controller with code

Question

I am using following code to launch a view controller modally. This view controller is not being created from scratch. Rather, I created and styled it in storyboard, gave it a name, embedded it in a navigation controller so it has a navigation bar and created cancel and done buttons, gave it a title and the code below launches it.

The problem is that while most of the features of the screen show up such as labels and images, the title and navigation bar that you can see in the storyboard disappear. Has anyone come across this issue and have a fix for it?

My code to launch VC created in storyboard.

- (void) editView:(id) sender
{
    NSLog(@"launch button pressed");
    UIStoryboard *storyBoard = self.storyboard;
    IDEditVC *editVC =
    [storyBoard instantiateViewControllerWithIdentifier:@"editvc"];
editVC.item = _item;
[self presentModalViewController:editVC animated:YES];
    }

You need to instantiate and present the navigation controller, not IDEditVC. — rdelmar, Apr 06 '15 at 20:53
The question you linked to does not have an accepted answer. If you think this is a duplicate, you have to show a question that was actually answered, not where the answer did not work for the poster. — user1904273, Apr 06 '15 at 21:00
Only because the OP didn't implement it correctly. That is the correct way to do it. — rdelmar, Apr 06 '15 at 21:00
So you know how to implement it correctly but that poster did not? Would you care to share your exceptional knowledge? — user1904273, Apr 06 '15 at 21:01
I did share my knowledge in that answer. As I said in my first comment here, you need to instantiate the navigation controller (give it an identifier) and present it. — rdelmar, Apr 06 '15 at 21:04
I gave it the nav controller an identifier and changed code but app is now crashing — user1904273, Apr 06 '15 at 21:09

MahatmaManic · Accepted Answer · 2015-04-06T21:16:02.877

1

I think what's happening is that since you are directly instantiating the view controller by name it's getting just that from the storyboard rather than embedding it in the nav controller.

Try this:

In your storyboard, make the Navigation Controller the initial/root View Controller for the storyboard
Instead of instantiating by name, use UIStoryboard's instantiateInitialViewController method.

EDIT: Based on your comments below, you might want to try this:

- (void) editView:(id) sender
{
    NSLog(@"launch button pressed");
    UIStoryboard *storyBoard = self.storyboard;
    IDEditVC *editVC =
    [storyBoard instantiateViewControllerWithIdentifier:@"editvc"];
    editVC.item = _item;

    UINavigationController *nav = [UINavigationController alloc] initWithRootViewController: IDEditVC];
    // Do whatever setup you want to here for your title bar, etc
    [self presentModalViewController:nav animated:YES];
}

edited Apr 06 '15 at 21:16

answered Apr 06 '15 at 20:55

MahatmaManic

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This app has a lot of screens and an entirely different controller is initial view controller. – user1904273 Apr 06 '15 at 20:57
Then break the viewcontroller you are presenting modally out into its own storyboard, or else instantiate a UINavigationController in code and embed your view controller in it – MahatmaManic Apr 06 '15 at 21:00
How would I instantiate the nav controller as opposed to the regular vc? Just give it a name and substitute the name? – user1904273 Apr 06 '15 at 21:03
I tried giving navcontroller name "editvcnav" and substituted that for editvc in above code but crashes in simulator. – user1904273 Apr 06 '15 at 21:08
I edited my answer above to explain what I meant – MahatmaManic Apr 06 '15 at 21:16

score 0 · Answer 2 · edited May 23 '17 at 12:06

0

Try to use PushViewController instead of instantiate:

How to push viewcontroller ( view controller )?

Good luck

edited May 23 '17 at 12:06

Community

1
1

answered Apr 06 '15 at 20:51

Black Magic

2,706
5
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Push View controller worked for nav buttons but title still does not show up. – user1904273 Apr 06 '15 at 21:09
Well you could always set the title, but I see you already have your answer ;) – Black Magic Apr 07 '15 at 08:00

Title and nav bar disappearing when launching view controller with code

2 Answers2