MTTransitions

Transitions ports from GL-Transitions to Metal.

Features

Up to 76 transitions
Image Transitions
UIView Transitions
UIViewController Push Transtions
UIViewController Present Transitions
Video Merge Transitions
Create video from images with transitions
Create video from images with transitions and background music

Requirements

iOS 10.0 +
Xcode 11.0 +
Swift 5.0 +

Transitions

Support Following Transitions:

Installation

MTTransitions is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod MTTransitions

Get Started

Each transition requires two input MTIImage. Image should be .oriented(.downMirrored).

import MTTransitions

let transition = MTBounceTransition()
transition.inputImage = <from Image>
transition.destImage = <to Image>

// animate progress from 0.0 to 1.0

imageView.image = transition.outputImage

UIView Transition

let effect = MTPerlinTransition()

MTTransition.transition(with: view, effect: effect, animations: {
    // Do your animation to your view
}) { (_) in
    // Transition completed
}

UIViewController Push Transition

class PushAViewController: UIViewController {

    private let transition = MTViewControllerTransition(transition: MTBurnTransition())
    
    // ...
}

extension PushAViewController: UINavigationControllerDelegate {
    
    func navigationController(_ navigationController: UINavigationController, animationControllerFor operation: UINavigationController.Operation, from fromVC: UIViewController, to toVC: UIViewController) -> UIViewControllerAnimatedTransitioning? {
        if operation == .push {
            return transition
        }
        return nil
    }
}

UIViewController Present Transition

class PresentAViewController: UIViewController {

    // ...
    
    let vc = PresentBViewController()
    vc.modalPresentationStyle = .fullScreen
    vc.transitioningDelegate = self
    present(vc, animated: true, completion: nil)
}

extension PresentAViewController: UIViewControllerTransitioningDelegate {
    
    func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
        return transtion
    }
    
    func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
        return transtion
    }
}

Video Transition

MTTransitions also support merging videos with transitions.

Support merge multiple video files
Support multiple transition effects
Support different multiple render size.
Support passthrough transition.

// pick one transtion effect
let effect = MTTransition.Effect.wipeLeft
let duration = CMTimeMakeWithSeconds(2.0, preferredTimescale: 1000)
try? videoTransition.merge(clips,
                           effect: effect,
                           transitionDuration: duration) { [weak self] result in

    guard let self = self else { return }
    let playerItem = AVPlayerItem(asset: result.composition)
    playerItem.videoComposition = result.videoComposition
    
    self.player.seek(to: .zero)
    self.player.replaceCurrentItem(with: playerItem)
    self.player.play()
}

Please refer VideoTransitionSampleViewController and MultipleVideoTransitionsViewController for more details.

Create Video From Images

MTMovieMaker support create video from a sequence images with transitions. You can also pass a local audio file url to MTMovieMaker to create background music.

let fileURL = URL(fileURLWithPath: path)
movieMaker = MTMovieMaker(outputURL: fileURL)
do {
    try MTMovieMaker?.createVideo(with: images, effects: effects) { result in
        switch result {
        case .success(let url):
            print(url)
        case .failure(let error):
            print(error)
        }
    }
} catch {
    print(error)
}

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