Image_alpha Gml Not Set Before Reading It
Accepted Answer
In iOS xv, UIKit has extended the usage of the scrollEdgeAppearance
, which by default produces a transparent background, to all navigation confined. The background is controlled past when your scroll view scrolls content behind the navigation bar. Your screenshots indicate that you are scrolled to the peak, and so the navigation bar has selected its scrollEdgeAppearance
over the standardAppearance
that it would use when scrolled, and on previous versions of iOS.
To restore the erstwhile look, you must adopt the new UINavigationBar
appearance APIs, UINavigationBarAppearance
. Remove your existing customizations and do something like this:
let appearance = UINavigationBarAppearance() appearance.configureWithOpaqueBackground() appearance.backgroundColor = <your tint color> navigationBar.standardAppearance = appearance; navigationBar.scrollEdgeAppearance = navigationBar.standardAppearance
In the general example, it is the last line navigationBar.scrollEdgeAppearance = navigationBar.standardAppearance
, which resolves the upshot by having the UINavigationBar
use the same appearance for both its standard and edge states. Also notation that this volition cause the curl view to underlap the navigation bar – we recommend confronting setting UINavigationBar.isTranslucent = true
.
You can also use the appearance proxy with the code above, simply substituting navigationBar.appearance().scrollEdgeAppearance = appearance
for the last line (as you lot are constructing your own appearance object – the thought is to just make sure both scrollEdge and standard appearances are the same).
Answers
In iOS 15, UIKit has extended the usage of the scrollEdgeAppearance
, which past default produces a transparent background, to all navigation bars. The background is controlled by when your scroll view scrolls content behind the navigation bar. Your screenshots betoken that you are scrolled to the top, and and so the navigation bar has selected its scrollEdgeAppearance
over the standardAppearance
that it would utilize when scrolled, and on previous versions of iOS.
To restore the old look, you lot must adopt the new UINavigationBar
appearance APIs, UINavigationBarAppearance
. Remove your existing customizations and do something like this:
let appearance = UINavigationBarAppearance() appearance.configureWithOpaqueBackground() advent.backgroundColor = <your tint color> navigationBar.standardAppearance = advent; navigationBar.scrollEdgeAppearance = navigationBar.standardAppearance
In the general instance, information technology is the last line navigationBar.scrollEdgeAppearance = navigationBar.standardAppearance
, which resolves the issue by having the UINavigationBar
utilize the same advent for both its standard and edge states. Too notation that this will crusade the roll view to underlap the navigation bar – we recommend against setting UINavigationBar.isTranslucent = true
.
You can also utilise the appearance proxy with the code above, simply substituting navigationBar.appearance().scrollEdgeAppearance = advent
for the last line (as you are amalgam your own appearance object – the idea is to just brand sure both scrollEdge and standard appearances are the same).
It worked similar a charm! Thank yous!
I'thousand seeing this upshot too. I'thou surprised that the default behavior is this and that it requires configuration now? I likewise had to set information technology for all appearance types to make it wait better, just there are still cases where the advent is foreign specially in the transitions between view controllers.
I have the same problem. The code has to be inserted in each controller and the transitions between the controllers is buggy (Xcode Beta 2, iOS 15 Beta ii).
My problem is the missing top line in the TabBar. I tin solve it only by adding a frame. But the frame would accept to be visible only at the top. Does anyone accept any ideas? Here is my electric current solution:
tabBarController?.tabBar.tintColor = "myTintColor" tabBarController?.tabBar.clipsToBounds = true tabBarController?.tabBar.layer.borderWidth = 0.five tabBarController?.tabBar.layer.borderColor = UIColor.lightGray.cgColor
thanks!
*** Update iOS15 Beta 3 / Xcode Beta iii ***
Since beta 3 the problem seems to exist solved in the master controller. But when I switch to a subcontroller, the separator line disappears. It no longer appears when I switch back to the main controller. This is definitely a bug!
Nosotros faced a similar problem and are because resolving it with making sure that we always set the background of the view of our view controllers to something other than clear such equally systembackgroundcolor, and ensuring that all of our view controllers use UIRectEdgeAll. Previously some view controllers and particularly WKWebViews had a clear background and UIRectEdgeNone.
I'd be curious to hear if this helps for anyone else. I similar this approach more every bit it feels less invasive than changing the appearance of the navigation bar.
This Navigation Bar Transparency trouble began when Apple made Dark Mode. I told them virtually it and Apple tree stock-still it only they take broken the Nav Bar again in iOS 15.
The consequence persists on iOS 15 Beta 8. Tried on both light/dark theme.
This doesn't seem to work at all with the iOS xv RC.
VC1 shows VC2. VC1 and VC2 are fine. Their navigation confined are the correct colour.
VC2 presents an image picker (of your library photos). Naught I practise seems to make the prototype picker utilise the correct colours.
I've tried to utilise Rincewind's code to style the picker, but it just shows as low-cal grey, with the nav bar buttons in white. I've implemented navigationController:willShowViewController:animated, but whatever I put in in that location is completely ignored.
It does seem that Apple decide to change the key behaviour of something, and just assume that developers will change their apps to cope with information technology How almost you give us a heads-up earlier you break our apps?
I've changed .barTintColor to UINavigationBarAppearance backgroundColor, set to standardAppearance and scrollEdgeAppearance and it works. But if present new ViewController modally with modalPresentationStyle == .fullscreen and dismiss, navigationBar'south background color on the first one changed to default.
In my case, when I update to xcode13 and iOS15。 I accept constitute that navigationBar and tabBar turns transparent。 My viewController is embed in UINavigationController
Afterward a series of tests, I plant the Settings the backgroundColor of navigationController is best Way to fix this
navigationController?.view.backgroundColor = .yourColor
Once the colour is set, everything is fine
@cblaze22 asked for an Objective-C version. Here:
UINavigationBarAppearance *navBarAppearance = [[UINavigationBarAppearance alloc] init]; [navBarAppearance configureWithOpaqueBackground]; navBarAppearance.backgroundColor = [UIColor blueColor]; [navBarAppearance setTitleTextAttributes: @{NSForegroundColorAttributeName:[UIColor whiteColor]}]; navBar.standardAppearance = navBarAppearance; navBar.scrollEdgeAppearance = navBarAppearance; [navBarAppearance release];` ```
After going through all the answers and so far and trial and error in interface builder the trouble is sorted for me after the following steps: (xcode 13 , iOS 13)
- cull standard and scroll edge appearances for the navigation bar.
- set both appearances to be the aforementioned.
Good luck
In case it helps someone, placing @Rincewind's code snippet in applicationDidBecomeActive
restored the pre-iOS15 await of the navigation bar and ensured the navigation controller background view color updated when the user changed between light and dark fashion while the app was running.
let advent = UINavigationBarAppearance() appearance.configureWithOpaqueBackground() appearance.backgroundColor = color // eg .blackness or .white nc.navigationBar.standardAppearance = advent; nc.navigationBar.scrollEdgeAppearance = nc.navigationBar.standardAppearance
In case someone is having problems with navigation title font and colour, add the following code to your extension
if allow attributes = self.navigationController?.navigationBar.largeTitleTextAttributes { barAppearance.largeTitleTextAttributes = attributes } if permit attributes = cocky.navigationController?.navigationBar.titleTextAttributes { barAppearance.titleTextAttributes = attributes }
hope information technology helps
fitzgeraldtheepost.blogspot.com
Source: https://developer.apple.com/forums/thread/682420
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