Custom modal transition

gistfile1.txt

//
//  MBSlideInPresentationController.swift
//  Mockingbot
//
//  Created by modao on 2018/3/15.
//  Copyright © 2018年 modao. All rights reserved.
//

import UIKit

class MBSlideInPresentationController: UIPresentationController {

    private var direction: MBSlideInAnimationManager.PresentationDirection
    fileprivate lazy var dimmingView: UIView = {
        let view = UIView()
        view.translatesAutoresizingMaskIntoConstraints = false
        view.backgroundColor = UIColor(white: 0.0, alpha: 0.5)
        view.alpha = 0
        let recognizer = UITapGestureRecognizer(target: self,
                                                action: #selector(MBSlideInPresentationController.handleTap(recognizer:)))
        view.addGestureRecognizer(recognizer)
        return view
    }()

    init(presentedViewController: UIViewController,
         presenting presentingViewController: UIViewController?,
         direction: MBSlideInAnimationManager.PresentationDirection) {
        self.direction = direction
        //3
        super.init(presentedViewController: presentedViewController,
                   presenting: presentingViewController)
    }

    override func presentationTransitionWillBegin() {
        containerView?.insertSubview(dimmingView, at: 0)
        dimmingView.snp.makeConstraints { make in
            make.edges.equalToSuperview()
        }
        guard let coordinator = presentedViewController.transitionCoordinator else {
            dimmingView.alpha = 1.0
            return
        }
        coordinator.animate(alongsideTransition: { _ in
            self.dimmingView.alpha = 1.0
        })
    }

    override func dismissalTransitionWillBegin() {
        guard let coordinator = presentedViewController.transitionCoordinator else {
            dimmingView.alpha = 0.0
            return
        }
        coordinator.animate(alongsideTransition: { _ in
            self.dimmingView.alpha = 0
        })
    }

    override func containerViewWillLayoutSubviews() {
        presentedView?.frame = frameOfPresentedViewInContainerView
    }

    override func size(forChildContentContainer container: UIContentContainer, withParentContainerSize parentSize: CGSize) -> CGSize {
        switch direction {
        case .left, .right:
            return CGSize(width: parentSize.width*(2.0/3.0), height: parentSize.height)
        default:
            return CGSize(width: parentSize.width, height: parentSize.height*(2.0/3.0))
        }
    }

    override var frameOfPresentedViewInContainerView: CGRect {
        //1
        var frame: CGRect = .zero
        frame.size = size(forChildContentContainer: presentedViewController,
                          withParentContainerSize: containerView!.bounds.size)
        //2
        switch direction {
        case .right:
            frame.origin.x = containerView!.frame.width*(1.0/3.0)
        case .bottom:
            frame.origin.y = containerView!.frame.height*(1.0/3.0)
        default:
            frame.origin = .zero
        }
        return frame
    }

    @objc func handleTap(recognizer: UITapGestureRecognizer) {
        presentingViewController.dismiss(animated: true)
    }
}

gistfile2.txt

//
//  MBSlideInPresentationAnimator.swift
//  Mockingbot
//
//  Created by modao on 2018/3/15.
//  Copyright © 2018年 modao. All rights reserved.
//

import UIKit

class MBSlideInPresentationAnimator: NSObject {

    let direction: MBSlideInAnimationManager.PresentationDirection

    let isPresentation: Bool

    init(direction: MBSlideInAnimationManager.PresentationDirection, isPresentation: Bool) {
        self.direction = direction
        self.isPresentation = isPresentation
        super.init()
    }
}

extension MBSlideInPresentationAnimator: UIViewControllerAnimatedTransitioning {

    func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
        return 0.3
    }

    func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
        guard let controller = isPresentation ? transitionContext.viewController(forKey: .to) : transitionContext.viewController(forKey: .from) else { return }
        if isPresentation {
            transitionContext.containerView.addSubview(controller.view)
        }
        // 3
        let presentedFrame = transitionContext.finalFrame(for: controller)
        var dismissedFrame = presentedFrame
        switch direction {
        case .left:
            dismissedFrame.origin.x = -presentedFrame.width
        case .right:
            dismissedFrame.origin.x = transitionContext.containerView.frame.size.width
        case .top:
            dismissedFrame.origin.y = -presentedFrame.height
        case .bottom:
            dismissedFrame.origin.y = transitionContext.containerView.frame.size.height
        }

        let initialFrame = isPresentation ? dismissedFrame : presentedFrame
        let finalFrame = isPresentation ? presentedFrame : dismissedFrame

        let animationDuration = transitionDuration(using: transitionContext)
        controller.view.frame = initialFrame
        UIView.animate(withDuration: animationDuration, animations: {
            controller.view.frame = finalFrame
        }) { finished in
            transitionContext.completeTransition(finished)
        }
    }
}

MBSlideInAnimationManager.swift

class MBSlideInAnimationManager: NSObject {

    var direction = PresentationDirection.left
    var disableCompactHeight = false

    enum PresentationDirection {
        case left, top, right, bottom
    }
}

extension MBSlideInAnimationManager: UIViewControllerTransitioningDelegate {
    func presentationController(forPresented presented: UIViewController,
                                presenting: UIViewController?,
                                source: UIViewController) -> UIPresentationController? {
        let presentationController = MBSlideInPresentationController(presentedViewController: presented,
                                                                     presenting: presenting,
                                                                     direction: direction)
        presentationController.delegate = self
        return presentationController
    }

    func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
        return MBSlideInPresentationAnimator(direction: direction, isPresentation: false)
    }

    func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
        return MBSlideInPresentationAnimator(direction: direction, isPresentation: true)
    }
}

extension MBSlideInAnimationManager: UIAdaptivePresentationControllerDelegate {
    func adaptivePresentationStyle(for controller: UIPresentationController, traitCollection: UITraitCollection) -> UIModalPresentationStyle {
        if traitCollection.verticalSizeClass == .compact, disableCompactHeight {
            return .overFullScreen
        } else {
            return .none
        }
    }
}

MBSlideInPresentationAnimator.swift

//
//  MBSlideInPresentationAnimator.swift
//  Mockingbot
//
//  Created by modao on 2018/3/15.
//  Copyright © 2018年 modao. All rights reserved.
//

import UIKit

class MBSlideInPresentationAnimator: NSObject {

    let direction: MBSlideInAnimationManager.PresentationDirection

    let isPresentation: Bool

    init(direction: MBSlideInAnimationManager.PresentationDirection, isPresentation: Bool) {
        self.direction = direction
        self.isPresentation = isPresentation
        super.init()
    }
}

extension MBSlideInPresentationAnimator: UIViewControllerAnimatedTransitioning {

    func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
        return 0.3
    }

    func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
        guard let controller = isPresentation ? transitionContext.viewController(forKey: .to) : transitionContext.viewController(forKey: .from) else { return }
        if isPresentation {
            transitionContext.containerView.addSubview(controller.view)
        }
        // 3
        let presentedFrame = transitionContext.finalFrame(for: controller)
        var dismissedFrame = presentedFrame
        switch direction {
        case .left:
            dismissedFrame.origin.x = -presentedFrame.width
        case .right:
            dismissedFrame.origin.x = transitionContext.containerView.frame.size.width
        case .top:
            dismissedFrame.origin.y = -presentedFrame.height
        case .bottom:
            dismissedFrame.origin.y = transitionContext.containerView.frame.size.height
        }

        let initialFrame = isPresentation ? dismissedFrame : presentedFrame
        let finalFrame = isPresentation ? presentedFrame : dismissedFrame

        let animationDuration = transitionDuration(using: transitionContext)
        controller.view.frame = initialFrame
        UIView.animate(withDuration: animationDuration, animations: {
            controller.view.frame = finalFrame
        }) { finished in
            transitionContext.completeTransition(finished)
        }
    }
}

MBSlideInPresentationController.swift

//
//  MBSlideInPresentationController.swift
//  Mockingbot
//
//  Created by modao on 2018/3/15.
//  Copyright © 2018年 modao. All rights reserved.
//

import UIKit

class MBSlideInPresentationController: UIPresentationController {

    private var direction: MBSlideInAnimationManager.PresentationDirection
    fileprivate lazy var dimmingView: UIView = {
        let view = UIView()
        view.translatesAutoresizingMaskIntoConstraints = false
        view.backgroundColor = UIColor(white: 0.0, alpha: 0.5)
        view.alpha = 0
        let recognizer = UITapGestureRecognizer(target: self,
                                                action: #selector(MBSlideInPresentationController.handleTap(recognizer:)))
        view.addGestureRecognizer(recognizer)
        return view
    }()

    init(presentedViewController: UIViewController,
         presenting presentingViewController: UIViewController?,
         direction: MBSlideInAnimationManager.PresentationDirection) {
        self.direction = direction
        //3
        super.init(presentedViewController: presentedViewController,
                   presenting: presentingViewController)
    }

    override func presentationTransitionWillBegin() {
        containerView?.insertSubview(dimmingView, at: 0)
        dimmingView.snp.makeConstraints { make in
            make.edges.equalToSuperview()
        }
        guard let coordinator = presentedViewController.transitionCoordinator else {
            dimmingView.alpha = 1.0
            return
        }
        coordinator.animate(alongsideTransition: { _ in
            self.dimmingView.alpha = 1.0
        })
    }

    override func dismissalTransitionWillBegin() {
        guard let coordinator = presentedViewController.transitionCoordinator else {
            dimmingView.alpha = 0.0
            return
        }
        coordinator.animate(alongsideTransition: { _ in
            self.dimmingView.alpha = 0
        })
    }

    override func containerViewWillLayoutSubviews() {
        presentedView?.frame = frameOfPresentedViewInContainerView
    }

    override func size(forChildContentContainer container: UIContentContainer, withParentContainerSize parentSize: CGSize) -> CGSize {
        switch direction {
        case .left, .right:
            return CGSize(width: parentSize.width*(2.0/3.0), height: parentSize.height)
        default:
            return CGSize(width: parentSize.width, height: parentSize.height*(2.0/3.0))
        }
    }

    override var frameOfPresentedViewInContainerView: CGRect {
        //1
        var frame: CGRect = .zero
        frame.size = size(forChildContentContainer: presentedViewController,
                          withParentContainerSize: containerView!.bounds.size)
        //2
        switch direction {
        case .right:
            frame.origin.x = containerView!.frame.width*(1.0/3.0)
        case .bottom:
            frame.origin.y = containerView!.frame.height*(1.0/3.0)
        default:
            frame.origin = .zero
        }
        return frame
    }

    @objc func handleTap(recognizer: UITapGestureRecognizer) {
        presentingViewController.dismiss(animated: true)
    }
}