Drawer Menu (iOS8〜)

DOViewControllerWithSideBar.swift

//
//  DOViewControllerWithSideBar.swift
//  DOViewControllerWithSideBar
//
//  Created by Daiki Okumura on 2015/02/11.
//  Copyright (c) 2015 Daiki Okumura. All rights reserved.
//

import UIKit

class DOViewControllerWithSideBar: UIViewController, UIViewControllerTransitioningDelegate {
    
    // MARK: UIViewControllerTransitioningDelegate
    
    // このメソッドを実装することで、presentViewController:animated:completion:を実行するときの振る舞いに UIPresentationControllerの実装クラス(CustomPresentationController)が適用される。
    func presentationControllerForPresentedViewController(presented: UIViewController, presentingViewController presenting: UIViewController!, sourceViewController source: UIViewController) -> UIPresentationController? {
        let isRightBar:Bool = (presented.title == "RightBar")
        println(isRightBar)
        return DOSideBarPresentationController(presentedViewController: presented, presentingViewController: presenting, isRightBar: isRightBar)
    }
    
    // アニメーションは UIViewControllerAnimatedTransitioning の実装クラスを使うと書き換えることができる。
    func animationControllerForPresentedController(presented: UIViewController, presentingController presenting: UIViewController, sourceController source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
        let isRightBar:Bool = (presented.title == "RightBar")
        println(isRightBar)
        return DOAnimatedTransitioning(isRightBar: isRightBar, isPresent: true)
    }
    func animationControllerForDismissedController(dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
        let isRightBar:Bool = (dismissed.title == "RightBar")
        println(isRightBar)
        return DOAnimatedTransitioning(isRightBar: isRightBar, isPresent: false)
    }
    
}

class DOSideBarPresentationController: UIPresentationController {
    
    // 呼び出し元のViewControllerの上に重ねるオーバーレイView
    var overlayView: UIView!
    let isRightBar: Bool
    let presentedViewFrame: CGRect
    
    init(presentedViewController: UIViewController!, presentingViewController: UIViewController!, isRightBar: Bool) {
        self.isRightBar = isRightBar
        self.presentedViewFrame = presentedViewController.view.frame
        super.init(presentedViewController: presentedViewController, presentingViewController: presentingViewController)
    }
    
    // 表示トランジション開始前に呼ばれる
    override func presentationTransitionWillBegin() {
        
        // オーバーレイViewの設定
        self.overlayView = UIView(frame: self.containerView.bounds)
        self.overlayView.gestureRecognizers = [UITapGestureRecognizer(target: self, action: "overlayDidTouch:")]
        self.overlayView.backgroundColor = UIColor.blackColor()
        self.overlayView.alpha = 0.0
        self.containerView.insertSubview(self.overlayView, atIndex: 0)
        
        // トランジションを実行
        self.presentedViewController.transitionCoordinator()?.animateAlongsideTransition({
            [unowned self] context in
            self.overlayView.alpha = 0.2
            }, completion: nil)
    }
    
    // 非表示トランジション開始前に呼ばれる
    override func dismissalTransitionWillBegin() {
        
        // トランジションを実行
        self.presentedViewController.transitionCoordinator()?.animateAlongsideTransition({
            [unowned self] context in
            self.overlayView.alpha = 0.0
            }, completion: nil)
    }
    
    // 非表示トランジション終了後に呼ばれる
    override func dismissalTransitionDidEnd(completed: Bool) {
        if completed {
            self.overlayView.removeFromSuperview()
        }
    }
    
    // 子のコンテナのサイズを返す
    override func sizeForChildContentContainer(container: UIContentContainer, withParentContainerSize parentSize: CGSize) -> CGSize {
        return self.presentedViewFrame.size
    }
    
    // 呼び出し先のViewControllerのFrame(表示トランジション後)を返す
    override func frameOfPresentedViewInContainerView() -> CGRect {
        return self.presentedViewFrame
    }
    
    // レイアウト開始前に呼ばれる
    override func containerViewWillLayoutSubviews() {
        self.overlayView.frame = self.containerView.bounds
        self.presentedView().frame = self.frameOfPresentedViewInContainerView()
    }
    
    // レイアウト開始後に呼ばれる
    override func containerViewDidLayoutSubviews() {
    }
    
    // オーバーレイの View をタッチしたときに呼ばれる
    func overlayDidTouch(sender: AnyObject) {
        self.presentedViewController.dismissViewControllerAnimated(true, completion: nil)
    }
}

class DOAnimatedTransitioning: NSObject, UIViewControllerAnimatedTransitioning {
    
    let isRightBar: Bool
    let isPresent: Bool
    
    init(isRightBar: Bool, isPresent: Bool) {
        self.isRightBar = isRightBar
        self.isPresent = isPresent
    }
    
    func transitionDuration(transitionContext: UIViewControllerContextTransitioning) -> NSTimeInterval {
        return 0.4
    }
    
    func animateTransition(transitionContext: UIViewControllerContextTransitioning) {
        if isPresent {
            presentAnimateTransition(transitionContext)
        } else {
            dissmissAnimateTransition(transitionContext)
        }
    }
    
    // MARK: Custom
    func presentAnimateTransition(transitionContext: UIViewControllerContextTransitioning) {
        // 呼び出し元ViewController
        let presentingController: UIViewController! = transitionContext.viewControllerForKey(UITransitionContextFromViewControllerKey)
        // 呼び出し先ViewController
        let presentedController: UIViewController! = transitionContext.viewControllerForKey(UITransitionContextToViewControllerKey)
        // コンテナView 呼び出し先ViewControllerを指定した呼び出し元ViewControllerの背後に追加します。
        let containerView: UIView! = transitionContext.containerView()
        containerView.insertSubview(presentedController.view, belowSubview: presentingController.view)
        
        
        // アニメーション
        UIView.animateWithDuration(
            self.transitionDuration(transitionContext),
            animations: {
                presentedController.view.frame.origin.x = self.isRightBar ? -presentedController.view.frame.width : presentedController.view.frame.width
            },
            completion: {
                finished in
                transitionContext.completeTransition(true)
        })
    }
    
    func dissmissAnimateTransition(transitionContext: UIViewControllerContextTransitioning) {
        // 呼び出し先ViewController
        let presentedController: UIViewController! = transitionContext.viewControllerForKey(UITransitionContextFromViewControllerKey)
        // コンテナView
        let containerView: UIView! = transitionContext.containerView()
        
        // アニメーション
        UIView.animateWithDuration(
            self.transitionDuration(transitionContext),
            animations: {
                presentedController.view.frame.origin.x = self.isRightBar ? containerView.bounds.size.width : -presentedController.view.frame.size.width
            },
            completion: {
                finished in
                transitionContext.completeTransition(true)
        })
    }
}