Avoid navigation bar becoming visible when there's scrollable content beneath it

Question

I have a default navigation bar on iOS 15, initially the bar itself has a tranparent background.

But when I scroll the view in the view controller, to make some content of it underneath the navigation bar. Then the bar suddenly has a visible background.

I haven't done any special setting to my navigation bar. And tried setting scrollEdgeAppearance with no luck.

if #available(iOS 13.0, *) {
  let barAppearance = UINavigationBarAppearance()
  barAppearance.configureWithTransparentBackground()
  navigationController?.navigationBar.scrollEdgeAppearance = barAppearance
} 

Answer 1

Add couple of lines to your code:

if #available(iOS 13, *) {
    let barAppearance = UINavigationBarAppearance()
    barAppearance.configureWithTransparentBackground()
    barAppearance.backgroundColor = .clear
    barAppearance.shadowColor = nil
    navigationController?.navigationBar.isTranslucent = true
    navigationController?.navigationBar.scrollEdgeAppearance = barAppearance
    navigationController?.navigationBar.standardAppearance = barAppearance
}