CODEWITHSUNDEEP
iphoneobjective-cios5ios4uinavigationbar
jin
jin

Reputation: 2155

How to avoid the Black box appeared when hidden the navigationbar?

I have a app with main page is a hidden navigationbar ,and when I back from child page with navigationbar to this main page ,because I set the navigation hidden in the main page method: - (void)viewWillAppear, I　found that a black box will appear with animation, how to avoid it? Thank you very much!!!

Upvotes: 2

Views: 2465

Answers (5)

ArturT
ArturT

Reputation: 90

Call layoutSubviews() after your call to hide or show the navigation bar:

[self.navigationController.view layoutSubviews];

Upvotes: 0

Kamran Khan
Kamran Khan

Reputation: 1368

May be this will help someone if its happening in a tabbar controller app while switching between tabs

override func viewWillAppear(_ animated: Bool) {
            super.viewWillAppear(animated)
            self.navigationController?.setNavigationBarHidden(true, animated: true)
        }

override func viewWillDisappear(_ animated: Bool) {
            super.viewWillDisappear(animated)
            if self.navigationController?.visibleViewController != self {
                self.navigationController?.setNavigationBarHidden(false, animated: true)
            }
        }

Upvotes: 2

Chandu kumar.Alasyam
Chandu kumar.Alasyam

Reputation: 722

For Swift3.0

In First ViewController

override func viewWillAppear(_ animated: Bool) {
     super.viewWillAppear(true)
     self.navigationController?.setNavigationBarHidden(true, animated: true)
    }

In Second ViewController

func backButtonPressed() {
        self.navigationController?.setNavigationBarHidden(false, animated: false)
        self.navigationController?.popViewController(animated: true)
    }

Upvotes: 0

jin
jin

Reputation: 2155

Ok , I find the answer:

self.navigationController.view.backgroundColor = [UIColor redColor];

Upvotes: 14

HannahCarney
HannahCarney

Reputation: 3631

This fixes the problem without hacking the colour, which could lead to navigation controllers being the wrong colour.

Just set it to be animated in viewWillAppear :)

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

and if you go back to page with nav controller set Animation to NO

- (IBAction)backButtonClicked:(id)sender {
    [self.navigationController setNavigationBarHidden:NO animated:NO];
    [self.navigationController popToRootViewControllerAnimated:YES];
}

Upvotes: 7

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