ViewController slide animation

Question

I want to create an animation like the iOS app facebook at tabswitch^[1]. I have already tried to develop some kind of animation, the problem that

Answer 1

If you want something for pushViewController navigation, you can try this.

However, when switching between tabs on a TabBarController, this will not work. For that, I'd go with @mihai-erős 's solution

Change the Animation duration as per your liking, and assign this class to your navigation segues, for a Slide Animation.

class CustomPushSegue: UIStoryboardSegue {

    override func perform() {
        // first get the source and destination view controllers as UIviews so that they can placed in navigation stack

        let sourceVCView = self.source.view as UIView!
        let destinationVCView = self.destination.view as UIView!
        let screenWidth = UIScreen.main.bounds.size.width

        //create the destination view's rectangular frame i.e starting at 0,0 and equal to screenwidth by screenheight
        destinationVCView?.transform = CGAffineTransform(translationX: screenWidth, y: 0)

        //the destinationview needs to be placed on top(aboveSubView) of source view in the app window stack before being accessed by nav stack
        // get the window and insert destination View
        let window = UIApplication.shared.keyWindow
        window?.insertSubview(destinationVCView!, aboveSubview: sourceVCView!)


        // the animation: first remove the source out of screen by moving it at the left side of it and at the same time place the destination to source's position
        // Animate the transition.
        UIView.animate(withDuration: 0.3, animations: { () -> Void in
            sourceVCView?.transform = CGAffineTransform(translationX: -screenWidth,y: 0)
            destinationVCView?.transform = CGAffineTransform.identity

        }, completion: { (Finished) -> Void in
            self.source.present(self.destination, animated: false, completion: nil)
        }) 
    }
}