Animation Guide

Fade Animation

Just let your Class conform TRViewControllerAnimatedTransitioning, I name the class is FadeTransitionAnimation. You should implement:

/// Required implement.
var transitionStatus: TransitionStatus?{get set}
/// Rquired implement.
var transitionContext: UIViewControllerContextTransitioning?{get set}

Just add:

public var transitionStatus: TransitionStatus?
public var transitionContext: UIViewControllerContextTransitioning?

You can also add：

var interacting: Bool{get set}
/// Rquired implement.
var transitionContext: UIViewControllerContextTransitioning?{get set}
    
var cancelPop: Bool{get set}
/// Option
var completion: (() -> Void)?{get set}
/// Option
var interactivePrecent: CGFloat{get}
/**
Option

- parameter index: index of navgationViewController.viewcontrollers
*/
func popToVCIndex(index: Int)

Note：
this property and method just use for TRNavgationTransitionDelegate and TRViewControllerTransitionDelegate. You should set tansitionContext.

We need a init method, here we don't need other parameters.

We also should implement this methods, due to TRViewControllerAnimatedTransitioning conform UIViewControllerAnimatedTransitioning:

// This is used for percent driven interactive transitions, as well as for container controllers that have companion animations that might need to
// synchronize with the main animation. 
public func transitionDuration(transitionContext: UIViewControllerContextTransitioning?) -> NSTimeInterval
// This method can only  be a nop if the transition is interactive and not a percentDriven interactive transition.
public func animateTransition(transitionContext: UIViewControllerContextTransitioning)

For transitionDuration(_:), set return 0.3s:

public func transitionDuration(transitionContext: UIViewControllerContextTransitioning?) -> NSTimeInterval {
        return 0.3
    }

For animateTransition(_:), here is Present code:

public func animateTransition(transitionContext: UIViewControllerContextTransitioning) {
    self.transitionContext = transitionContext
    let fromVC = transitionContext.viewControllerForKey(UITransitionContextFromViewControllerKey)
    let toVC = transitionContext.viewControllerForKey(UITransitionContextToViewControllerKey)
    let containView = transitionContext.containerView()
    
    containView?.addSubview(fromVC!.view)
    containView?.addSubview(toVC!.view)
    toVC!.view.layer.opacity = 0
    
    UIView.animateWithDuration(transitionDuration(transitionContext), delay: 0, options: .CurveEaseInOut, animations: {
        toVC!.view.layer.opacity = 1
        }) { (finished) -> Void in
            transitionContext.completeTransition(!transitionContext.transitionWasCancelled())
    }
}

Hey~ We have completed Dismiss, same to Present~

For more, we can swap fromVC and toVC, or rename to you like.
You can see Full code on FadeTransitionAnimation.
About more animation, you can read [官方文档](https://developer.apple.com/library/ios/documentation/Cocoa/Conceptual/CoreAnimation_guide/Introduction/Introduction.html)、[A GUIDE TO IOS ANIMATION](http://book.kittenyang.com)、[iOS Core Animation Advanced Techniques](http://www.amazon.com/iOS-Core-Animation-Advanced-Techniques-ebook/dp/B00EHJCORC)、[iOS Animations by Tutorials Second Edition](http://www.raywenderlich.com/store/ios-animations-by-tutorials). I just introduce how to write animation for this project.

Try your code now~：

tr_presentViewController(nav, method: .Custom(FadeTransitionAnimation()), completion: nil)

You can use Fade to show guide viewController for you app. ^_^

Other Tips

Gesture

I have write Swipe Back. For more gestures , you have to write your code on your file.

I have some troubles for PhotoTransitionAnimation that is following Apple's Photos. If you are intresting this, see PhotoTransitionAnimation.swift.