How to hide Navigation Bar without losing slide-back ability

Question

I have a UITableView and it has a nav bar(got from UINavigationViewController), it's able to go back by sliding back using a finger.

I tried to hide the nav bar but keep the slide-back ability, code:

- (void)viewWillAppear:(BOOL)animated {
    [[self navigationController] setNavigationBarHidden:YES animated:YES];
}

This successfully hid the nav bar, however, I can no longer slide back to the last screen either.

Is there any way to hide the nav bar but keep the slide-back ability?

score 64 · Answer 1 · edited Aug 02 '17 at 12:32

64

Tested with Swift 2 the solution of @gabbler, if you use

self.navigationController?.navigationBar.hidden = true

Swift 3.0

self.navigationController?.navigationBar.isHidden = true

instead of

self.navigationController?.navigationBarHidden = true

the swipe back gesture works like a charm!

edited Aug 02 '17 at 12:32

Mohamed Jaleel Nazir

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answered May 07 '16 at 18:09

Ber.to

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For some amazingly werid and beautiful reason this actually works. Might it be a bug in UIKit? – Entalpi Jun 29 '16 at 15:23
2

Note that animating this to be **system-smooth** in `viewWillAppear:` and `viewWillDisappear:` to disable a `UINavigationBar` in a particular `UIViewController` inside a `UINavigationController` can be a really good challenge, especially when doing `viewWillDisappear:`. For that particular case, we use `setNavigationBarHidden:animated:` but this also disables the `interactivePopGestureRecognizer`. In my particular case, I don't do what this answer says because it's hard and pretty much buggy to animate this property. – Alejandro Iván Feb 07 '17 at 15:58
`self.navigationController?.navigationBar.isHidden = true` does not hide the nav bar in iOS 11/Swift 4.x; only `self.navigationController?.navigationBarHidden = true` does. – Evan R Mar 27 '18 at 12:37
@EvanR, on my device and simulator (latest iOS - 11.3) works fine. – Vadim May 16 '18 at 14:35
1

I can confirm that it's still working on iOS 11.4 and Swift 4.x. – atereshkov Jul 23 '18 at 11:49

score 26 · Accepted Answer · edited Jul 18 '16 at 07:13

26

Found the solution:

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    // hide nav bar
    [[self navigationController] setNavigationBarHidden:YES animated:YES];

    // enable slide-back
    if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        self.navigationController.interactivePopGestureRecognizer.enabled = YES;
        self.navigationController.interactivePopGestureRecognizer.delegate = self;
    }
}


- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {
    return YES;
}

And in .h file, conform to UIGestureRecognizerDelegate

edited Jul 18 '16 at 07:13

atulkhatri

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answered Oct 13 '14 at 02:56

Ascendant

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1

It is working fine! Instead of setting **setNavigationBarHidden:YES**, in a Embed In > Navigation Controller then select _UINavigationController_ and uncheck **Shows Navigation Bar**. By unchecking that, hiding navigation bar code can be removed. – Antony Raphel Dec 28 '16 at 12:47

gabbler · Answer 3 · 2014-10-13T03:11:51.513

7

Use

self.navigationController.navigationBar.hidden = YES;

or add this line in viewWillAppear:

self.navigationController.interactivePopGestureRecognizer.delegate = self;

It seems the interaction is not effective, adding this line and make the view controller conforms to the UIGestureRecognizerDelegate protocol will make it work.

edited Oct 13 '14 at 03:11

answered Oct 13 '14 at 02:49

gabbler

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Wyetro · Answer 4 · 2014-10-13T03:48:17.233

Make sure to include:

self.navigationController.navigationBar.hidden = YES;

And:

self.navigationController.interactivePopGestureRecognizer.delegate = self;

And:

if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        self.navigationController.interactivePopGestureRecognizer.enabled = YES;
    }

It should appear like this:

- (void)viewWillAppear:(BOOL)animated {

    self.navigationController.navigationBar.hidden = YES;
    self.navigationController.interactivePopGestureRecognizer.delegate = self;
    if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
            self.navigationController.interactivePopGestureRecognizer.enabled = YES;
        }
}

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {
    return YES;
}

Thanks for the edit, it assigns the delegate to itself, but it doesn't implement the gestureRecognizerShouldBegin method. I've added the solution that works for me. Thank you for your effort, I appreciate it. — Ascendant, Oct 13 '14 at 03:26
@ZinanXing, haha I added that to my code and then I saw where you said you found a solution... — Wyetro, Oct 13 '14 at 03:48

score 3 · Answer 5 · answered Jul 23 '18 at 11:51

3

Swift 4.x and iOS 11.4.

The @gabbler solution is still working. Idk, looks like this is a UIKit bug, but..

Just use:

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)

    self.navigationController?.navigationBar.isHidden = true
}

override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(animated)

    self.navigationController?.navigationBar.isHidden = false
}

answered Jul 23 '18 at 11:51

atereshkov

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Only solution that worked for me on iOS 12 swift 4.2! – Bogdan Razvan Mar 08 '19 at 12:54

score 2 · Answer 6 · answered Mar 23 '19 at 14:53

Zinan Xings solution in Swift 4.2 (Please give him upvote!):

func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
    return true
}

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)

    self.navigationController?.setNavigationBarHidden(true, animated: true)
    self.navigationController?.interactivePopGestureRecognizer?.isEnabled = true
    self.navigationController?.interactivePopGestureRecognizer?.delegate = self
}

score 1 · Answer 7 · answered Aug 09 '17 at 08:38

for Xamarin Forms i was Struggle with this so first don't NavigationRenderer you'll get NavigationController null instead use PageRenderer:

[assembly: Xamarin.Forms.ExportRenderer(typeof(ContentPage), typeof(ContentPageRenderer))]
namespace sample
{
    class ContentPageRenderer : PageRenderer
    {
        public override void ViewWillAppear(bool animated)
        {
            base.ViewDidAppear(animated);

            var navctrl = this.ViewController.NavigationController;
            navctrl.InteractivePopGestureRecognizer.Delegate = new UIGestureRecognizerDelegate();
            navctrl.InteractivePopGestureRecognizer.Enabled = true;

        }
    }
}

score 1 · Answer 8 · answered Dec 08 '20 at 17:30

Here is a working code for Swift 5:

private func setupNavController() {
            
    navigationController?.setNavigationBarHidden(true, animated: true)     
    self.navigationController?.interactivePopGestureRecognizer?.delegate = nil
    if let interactivePopGestureRecognizer = navigationController?.interactivePopGestureRecognizer {
        self.tableView.panGestureRecognizer.require(toFail: interactivePopGestureRecognizer)
    }
}

I have a UIViewController which contains a UITableView inside. This code helps you keep the smooth transition when you swipe back or press the back button. Call this function in viewWillAppear.

score 0 · Answer 9 · answered Oct 13 '14 at 05:30

0

If hiding the the navigation bar did't help, try changing the rect of the navigation bar and see?

navBarBgFrame.origin.y = - navBarBgFrame.size.height;

answered Oct 13 '14 at 05:30

Prabhu.Somasundaram

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How to hide Navigation Bar without losing slide-back ability

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