How I can implement Smooth UINavigationBar color change transition in iOS

Asked Apr 24 '18 at 03:33

Active Apr 24 '18 at 05:16

Viewed 388 times

I'm trying to make the UINavigationBar color transition smooth. I've looked around and I'm using (this) approach.

In the ChildViewController I have below mentioned code:

//Transition to transparent navbar
        override func viewWillAppear(_ animated: Bool) {
            super.viewWillAppear(animated)
            UIView.animate(withDuration: 0.1) {
                self.navigationController?.navigationBar.setBackgroundImage(UIImage(), for: .default)
                self.navigationController?.navigationBar.shadowImage = UIImage()
                self.navigationController?.navigationBar.barStyle = .black
                self.navigationController?.navigationBar.layoutIfNeeded()
            }
        }

// Transition to default Navbar
        override func willMove(toParentViewController parent: UIViewController?) {
                self.navigationController?.navigationBar.barStyle = .default
                self.navigationController?.navigationBar.setBackgroundImage(nil, for: .default)
                self.navigationController?.navigationBar.shadowImage = nil
                self.navigationController?.navigationBar.barTintColor = nil
        }

Resultant has flicker effect when swiped slowly from ChildViewController to parent

edited Apr 24 '18 at 04:13

asked Apr 24 '18 at 03:33

Codetard

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Do you need to animate to the transparent navbar? – stevenpcurtis Apr 24 '18 at 07:18
Flicker is the issue! Check out the gif. – Codetard Apr 24 '18 at 08:38
Check this post may helps https://stackoverflow.com/questions/39835420/navigationbar-delay-updating-bartintcolor-ios10/40255483#40255483 – Joe Apr 24 '18 at 10:46
@Joe this doesn't help! – Codetard Apr 24 '18 at 11:20
So the issue persists without animation? – stevenpcurtis Apr 25 '18 at 01:34

How I can implement Smooth UINavigationBar color change transition in iOS

0 Answers0