Real time blur effect for Navigation Bar

Question

How to achieve the real time blurring effect for the navigation bar just like the Trailers app in iPhone.

i.e As you scroll the contents should get blurred behind th

Answer 1

I first added addBlurEffect() method and then in AppDelegate, I added

 UINavigationBar.appearance().setBackgroundImage(UIImage(), forBarMetrics: .Default)

 UINavigationBar.appearance().shadowImage = UIImage()

 UINavigationBar.appearance().backgroundColor = UIColor.clearColor()

 UINavigationBar.appearance().translucent = true

Now it works for me