Hide FabButton when floatingViewController appears. Cosmicmind/Material

Question

I want to hide a FabButton everytime a floatingViewController appears and show it again when I close the view.

I tried hiding the FabButton itself with

self.menuButton.hidden = true

but there isn't a callback function when I close the floatingViewController so I dont have a way to un hide it.

I also tried setting the zPosition manually but the button is unaffected

Is there a better approach to this?

Answer 1

The NavigationBarViewController has delegation methods for detecting the state of the floatingViewController. Set the delegate object,

navigationBarViewController?.delegate = self

Then try out the delegate methods:

extension AppNavigationBarViewController: NavigationBarViewControllerDelegate {
    /// Delegation method that executes when the floatingViewController will open.
func navigationBarViewControllerWillOpenFloatingViewController(navigationBarViewController: NavigationBarViewController) {
    print("Will Open")
}

    /// Delegation method that executes when the floatingViewController will close.
func navigationBarViewControllerWillCloseFloatingViewController(navigationBarViewController: NavigationBarViewController) {
    print("Will Close")
}

    /// Delegation method that executes when the floatingViewController did open.
func navigationBarViewControllerDidOpenFloatingViewController(navigationBarViewController: NavigationBarViewController) {
    print("Did Open")
}

    /// Delegation method that executes when the floatingViewController did close.
func navigationBarViewControllerDidCloseFloatingViewController(navigationBarViewController: NavigationBarViewController) {
    print("Did Close")
}

}

You should be able to use these methods to achieve the desired effect.