CATransition Extension

CATransition Extension.swift

extension CATransition {

func segueFromBottom() -> CATransition {
    self.duration = 0.375 //set the duration to whatever you'd like.
    self.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeInEaseOut)
    self.type = CATransitionType.moveIn
    self.subtype = CATransitionSubtype.fromTop
    return self
}

func segueFromTop() -> CATransition {
    self.duration = 0.375 //set the duration to whatever you'd like.
    self.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeInEaseOut)
    self.type = CATransitionType.moveIn
    self.subtype = CATransitionSubtype.fromBottom
    return self
}

func segueFromLeft() -> CATransition {
    self.duration = 0.1 //set the duration to whatever you'd like.
    self.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeInEaseOut)
    self.type = CATransitionType.moveIn
    self.subtype = CATransitionSubtype.fromLeft
    return self
}

func popFromRight() -> CATransition {
    self.duration = 0.1 //set the duration to whatever you'd like.
    self.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeInEaseOut)
    self.type = CATransitionType.reveal
    self.subtype = CATransitionSubtype.fromRight
    return self
}

func popFromLeft() -> CATransition {
    self.duration = 0.1 //set the duration to whatever you'd like.
    self.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeInEaseOut)
    self.type = CATransitionType.reveal
    self.subtype = CATransitionSubtype.fromLeft
    return self
   }
}

let nav = self.navigationController //grab an instance of the current navigationController
    DispatchQueue.main.async { //make sure all UI updates are on the main thread.
    nav?.view.layer.add(CATransition().segueFromLeft(), forKey: nil)
    nav?.pushViewController(YourViewController(), animated: false)
}