Type 'AnimationController' does not conform to protocol 'UIViewControllerAnimatedTransitioning'

Question

import Foundation
import UIKit

enum TransitionType {
   case Presenting, Dismissing
}

class AnimationController: NSObject, UIViewControllerAnimatedTransitioning {
   var duration: NSTimeInterval
   var isPresenting: Bool
   var originFrame: CGRect

   init(withDuration duration: NSTimeInterval, forTransitionType type: TransitionType, originFrame: CGRect) {
      self.duration = duration
      self.isPresenting = type == .Presenting
      self.originFrame = originFrame

      super.init()
   }

   func transitionDuration(transitionContext: UIViewControllerContextTransitioning?) -> NSTimeInterval {
       return self.duration
   }
}

The code was adapted from the below tutorial:

• How to Create Custom View Controller Transitions and Animations

Answer 1

It's what the error says. The code hasn't fully adopted the UIViewControllerAnimatedTransitioning protocol. You need to implement public func animateTransition(transitionContext: UIViewControllerContextTransitioning), which happens in the next block of code in the article you linked to.