Hi David. I hate to tell you, your code doesn’t work.
The old UINavigationBar background that I’m trying to remove is still there
when I use your code over what I stumbled across.
Something in the code below does remove the background image.
self.navigationController!.navigationBar.isTranslucent = false
self.navigationController!.navigationBar.titleTextAttributes =
[.foregroundColor: UIColor.white]
let navBar = self.navigationController!.navigationBar
let standardAppearance = UINavigationBarAppearance()
standardAppearance.configureWithOpaqueBackground()
standardAppearance.backgroundImage = UIImage()
navBar.standardAppearance = standardAppearance
navBar.scrollEdgeAppearance = standardAppearance
self.navigationController?.navigationBar.backgroundImage(for: .default)
navigationController?.navigationBar.setBackgroundImage(UIImage(), for:
.default)
Sadly, each build takes 2 minutes (thanks Swift!) even if I’m only changing 1
line, so it’s not time effective to figure out exactly what is.
Fun times.
Cheers,
Alex Zavatone
> On Jan 28, 2022, at 2:02 PM, David Duncan <david.dun...@apple.com> wrote:
>
>
>
>> On Jan 28, 2022, at 11:50 AM, Alex Zavatone <z...@mac.com
>> <mailto:z...@mac.com>> wrote:
>>
>> Awesome. Thank you, David.
>>
>>
>> I stumbled across this too while going through Apple documentation. What’s
>> scary is that I have no idea why it works.
>>
>> self.navigationController!.navigationBar.barStyle = .default
>> self.navigationController!.navigationBar.isTranslucent = false
>> self.navigationController!.navigationBar.titleTextAttributes =
>> [.foregroundColor: UIColor.white]
>> self.navigationController?.navigationBar.backgroundImage(for: .default)
>> navigationController?.navigationBar.setBackgroundImage(UIImage(),
>> for: .default)
>
> This stuff is pre-iOS 13 appearance customization. Using the new stuff will
> disable it.
>
>>
>> let navBar = self.navigationController!.navigationBar
>> let standardAppearance = UINavigationBarAppearance()
>> standardAppearance.configureWithOpaqueBackground()
>> standardAppearance.backgroundImage = UIImage()
>>
>> navBar.standardAppearance = standardAppearance
>> navBar.scrollEdgeAppearance = standardAppearance
>
> With iOS 13 the navigation bar now has multiple appearance states. The
> scrollEdgeAppearance is when your bar is at the edge of a scroll view (top
> for a navigation bar, bottom for tab & toolbar). This configures the bar to
> use the same appearance state (in this case, a solid color background, using
> UIColor.systemBackgroundColor). In context the setting of backgroundImage
> doesn’t do anything (it defaults to nil and empty images have identical
> behavior).
>
> By setting standardAppearance == scrollEdgeAppearance it in turn disables the
> “bar becomes transparent at the top” behavior introduced for large titles in
> iOS 13 and extended to all bar in iOS 15.
>
>>
>>
>> Thanks again David. You’re on my Christmas list.
>>
>> Alex Zavatone
>>
>>> On Jan 28, 2022, at 1:30 PM, David Duncan <david.dun...@apple.com
>>> <mailto:david.dun...@apple.com>> wrote:
>>>
>>> UINavigationBarAppearance *appearance = [UINavigationBarAppearance new];
>>> [appearance configureWithTransparentBackground];
>>> navigationItem.standardAppearance = appearance;
>>>
>>> Thats the simplest per-item way to do it. This does imply you adopt the new
>>> appearance APIs introduced in iOS 13.
>>>
>>>> On Jan 28, 2022, at 11:03 AM, Alex Zavatone via Cocoa-dev
>>>> <cocoa-dev@lists.apple.com <mailto:cocoa-dev@lists.apple.com>> wrote:
>>>>
>>>> Hi there. I’m in the middle of trying to find out how the hell to remove
>>>> a background from a UINavigationBar and it’s not easy. You’d think that
>>>> you could get a UInavigationBar.navigationitem.background and remove it
>>>> from a superview or set its alpha to 0, but it’s not that easy.
>>>>
>>>> Does anyone have any clue how to get a reference to the background once it
>>>> has been set so that it can be set to 0 alpha or removed from the
>>>> superview?
>>>>
>>>> Thanks in advance and happy Friday. Apple sure has ways to make things
>>>> that should be simple very obscure and extremely deifficult to handle.
>>>>
>>>> Cheers,
>>>> Alex Zavatone
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>>>
>>
>
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