Non-Translucent UItabbar Creates Strange Grey Bar

Non-translucent UITabBar creates strange grey bar

This

        UITabBar.appearance().isTranslucent = false

is a hack (non-documented assumption about TabView internal implementation) that breaks NavigationView layout (removes view to which NavigationView has active constraints)

Here are possible workarounds:

1. use only one root NavigationView

struct ContentView: View {

    init() {

        UITabBar.appearance().backgroundColor = UIColor.white
        UITabBar.appearance().isTranslucent = false
    }

    @State private var title = ""
    var body: some View {

        NavigationView {
            TabView {

                Text("First tab")
                    .padding(10)
                    .background(Color.white)
                    .onAppear {
                        self.title = "First tab"
                    }
                    .tabItem {
                        Text("First tab")
                }

                Text("Second tab")
                    .padding(10)
                    .background(Color.white)
                    .onAppear {
                        self.title = "Second tab"
                    }
                    .tabItem {
                        Text("Second tab")
                }
            }
            .navigationBarTitle(Text(title), displayMode: .inline)
        }
    }
}

2. Create custom tab bar (using HStack of Button views)

UISplitView with UITabbar

I subclassed UISplitViewController and added the line below to viewDidLoad and that fixed the grey line.

self.extendedLayoutIncludesOpaqueBars = YES;

UITabBarItem icon not colored correctly for iOS 13 when a bar tint color is specified in Interface Builder in Xcode 11, beta 2

On the surface, this might seem like a bug, however you can mitigate it by defining an .unselectedItemTintColor on your UITabBar instance.

self.tabBar.unselectedItemTintColor = [UIColor lightGrayColor];

Remove UITabbar upper border line

[self.tabBar setValue:@(YES) forKeyPath:@"_hidesShadow"];

or you can use

[[UITabBar appearance] setShadowImage:[UIImage imageNamed:@"transparentShadow.png"]];

or

 [[UITabBar appearance] setShadowImage:nil];

UITabBarItem badge colour is showing grey

It was my mistake, I had set the Tab bar item Badge colour specifically to grey in the storyboard.

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