CODEWITHSUNDEEP
iosobjective-cuikitios11
Tamás Zahola
Tamás Zahola

Reputation: 9321

iOS 11 large-title navigation bar not collapsing

The Apple guy in the What's new in Cocoa Touch WWDC video said that the new large-title navigation bar will magically hook into the top-level scroll view of the underlying view controller and collapse/expand itself automatically while scrolling up and down. (And by "magically", he probably meant that they failed to monkey patch this functionality into the already embarassing UINavigationController-UINavigationBar-UINavigationitem APIs in a usable way, so they had to resort to hooking into some heuristically chosen scroll view behind the scenes)

Even though I was prepared that this "automatic" collapse/expand wouldn't work if I deviate the slightest from the basic UINavigationController + UITableView/UICollectionView setup, it seems that even in this simplest case it doesn't work as expected.

Here's what I have:

A UITabBarController which contains a UINavigationController, which contains a UIViewController, which has a UITableView as its view. Tapping the first cell in the table will push a second view controller on the navigation stack:

storyboard

No code, just the storyboard.

I've checked "Prefers large titles" for the navigation bar to activate large titles. Now, if I run the app and scroll up/down on the table view, the navigation bar stays the same - large - size; it doesn't collapse:

stuck with large title

However, I've found that if I set the second view controller's navigation item to use the small navigation bar (by setting "Large Title" to the value "Never"), then if I open that page and navigate back, the interactive collapse magically starts working on the first page:

interactive collapse works after back navigation

Am I missing something here, or is this feature not working properly? Here's the sample project I'm using: https://github.com/tzahola/iOS-11-Large-Title-Navigation-Bar

And by the way, I'm using the officially released iOS 11, not the betas.

2017-09-23 Update: I've sent a bug report to Apple, and opened a ticket on openradar.me: http://www.openradar.me/radar?id=5017601935671296

Upvotes: 60

Views: 33607

Answers (8)

Dmytro Yashchenko
Dmytro Yashchenko

Reputation: 921

TableView of its container should be at the top of ViewController's view hierarchy (RootView on screenshot). Otherwise it won't work.

enter image description here

Upvotes: 0

flutterloop
flutterloop

Reputation: 578

It's an odd bug. The fix is to toggle OFF prefersLargeTitles in the storyboard and to set this in viewDidLoad of your nav controller's root vc:

navigationController?.navigationBar.prefersLargeTitles = true

Upvotes: 0

Alexandr Arsenyuk
Alexandr Arsenyuk

Reputation: 95

Make sure that addSubview(tableView) placed before others addSuview(someview)

Upvotes: 7

Glenn Posadas
Glenn Posadas

Reputation: 13283

Year 2020, iOS 13.0, this WAS NEVER mentioned here. I literally spent an hour or two for this.

Issue: Large title won't collapse when doing layout programmatically using Snapkit (an autolayout framework)

Solution: SETUP YOUR VIEWS (including navigationController stuff and tableView) inside loadView() NOT in viewDidLoad().

Upvotes: 4

kamil3
kamil3

Reputation: 1252

If there is any other view in addition to tableView, also make sure tableView is on the top of that view(s), right under the Safe Area:

enter image description here

Upvotes: 43

satish
satish

Reputation: 21

@TamasZahola @mohamede1945

Guys I had the same problem. I was able to resolve this issue by adding following snippet on my first View Controller of Navigation Controller

navigationController?.navigationBar.prefersLargeTitles = true

Upvotes: 2

D4ttatraya
D4ttatraya

Reputation: 3404

Or instead of changing anything in storyboard, do this:

override func viewDidLoad() {
    super.viewDidLoad()
    if #available(iOS 11.0, *) {
        self.navigationItem.largeTitleDisplayMode = .never
        self.navigationItem.largeTitleDisplayMode = .always
    }
}

No matter which language!

This is because large titles on navigation item decides whether or not to collapse on the basis of large title behaviour on previous screen navigation item title.

Upvotes: 14

Tamás Zahola
Tamás Zahola

Reputation: 9321

Good news! I've just figured out that if I set "Large Titles" to "Never" on the storyboard, and then set it via code, then it works:

- (void)viewDidLoad {
    [super viewDidLoad];
    self.navigationItem.largeTitleDisplayMode = UINavigationItemLargeTitleDisplayModeAutomatic;
}

Seems like Apple forgot to handle the case when the navigation item has its largeTitleDisplayMode set via the Interface Builder.

So until they fix this issue, leave "Large Titles" as "Never" on storyboards, and set them via code in viewDidLoad.

You just need to do that to the first view controller. Subsequent view controllers honor the value in storyboard.

Upvotes: 28

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