Restore navigationBar background image after setting it to [UIImage new]

Question

I needed a completely transparent navigation bar for the mapView so I did this:

[self.navigationController.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
[self.navigationController.navigationBar setShadowImage:[UIImage new]];

That returns the desired effect, as seen here:

Now I have a problem when I go to any other because my navigationBar remains transparent:

How do I restore default settings of the navigationBar's backgroundImage and shadowImage?

Solution 1

Set nil for image of navigation Controller on viewWillDisappear on map view

Set this two method in your mapview

MapView.m

-(void)viewWillAppear:(BOOL)animated{
    [self.navigationController.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
    [self.navigationController.navigationBar setShadowImage:[UIImage new]];
}

-(void)viewWillDisappear:(BOOL)animated{
    [self.navigationController.navigationBar setBackgroundImage:nil forBarMetrics:UIBarMetricsDefault];
    [self.navigationController.navigationBar setShadowImage:nil];
}

Solution 2

For Swift 3:

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

  self.navigationController?.navigationBar.setBackgroundImage(UIImage(), for: UIBarMetrics.default)
  self.navigationController?.navigationBar.shadowImage = UIImage()
}

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

  self.navigationController?.navigationBar.setBackgroundImage(nil, for: UIBarMetrics.default)
  self.navigationController?.navigationBar.shadowImage = nil
}

Comments

[Bhavesh Nayi]

add navigationbar image in viewWillDisappear method.

[Toseef Khilji]

@budidino: Happy to Help you :)

[ryo]

viewWillDisappear is the point! I used viewDidDisappear, it is WRONG! Hope that can save other's time.

[Jeevan Thandi]

Does anyone experience the navigation bar turning black for a second in this transition?

[turingtested]

It doesn't work together with large titles in iOS 11 - hopefully a bug that will be fixed. [self.navigationController.navigationBar setBackgroundImage:nil forBarMetrics:UIBarMetricsDefault] doesn't restore the status bar.

[Cole Roberts]

This works for Swift 4 as well: self.navigationController?.navigationBar.setBackgroundImage(‌​nil, for: UIBarMetrics.default)

[MagicFlow]

@JeevanThandi yes I do too. Did you find a solution to this?

[George Sabanov]

@turingtested Did you find a solution for Large title nav bar?