iOS 15 Navigation Bar Transparent

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To use your own colour scheme, use the following:

Swift

// White non-transucent navigatio bar, supports dark appearance
if #available(iOS 15, *) {
    let appearance = UINavigationBarAppearance()
    appearance.configureWithOpaqueBackground()
    UINavigationBar.appearance().standardAppearance = appearance
    UINavigationBar.appearance().scrollEdgeAppearance = appearance
}

Objective-c

if (@available(iOS 15.0, *)) {
    UINavigationBarAppearance *navBarAppearance = [[UINavigationBarAppearance alloc] init];
    navBarAppearance.backgroundColor = [UIColor redColor];
    [navBarAppearance configureWithOpaqueBackground];
    [UINavigationBar appearance].standardAppearance = navBarAppearance;
    [UINavigationBar appearance].scrollEdgeAppearance = navBarAppearance;
}

To get the default translucent behaviour, the way the default was before iOS 15, just set the scrollEdgeAppearance:

Swift

if #available(iOS 15, *) {
    UINavigationBar.appearance().scrollEdgeAppearance = UINavigationBarAppearance()
}

Objective-C

if (@available(iOS 15.0, *)) {
    [UINavigationBar appearance].scrollEdgeAppearance = [[UINavigationBarAppearance alloc] init]; 
}

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