iOS에서 반모달/하프모달 구현에 대한 요약

소개

반모달/하프모달이란?

・モードの完全遷移が起こらない
・モードを多重化しながらパラレルに対話可能
・モードを終了させずにモードからの一時退避が可能
・擬似的なマルチウインドウ・インターフェイスに応用可能
・スワイプなどインタラクションコストの低い操作方法によってモードの切り替えが可能

구현 방법

UIModalPresentationStyle 사용

     let vc = UIViewController()
     vc.modalPresentationStyle = .pageSheet
     present(vc, animated: true, completion: nil)

라이브러리 사용

SCENEE/FloatingPanel

slackhq/PanModal

직접 구현

철저 조사

UIViewControllerTransitioningDelegate

let vc = UIViewController()
vc.modalPresentationStyle = .custom
vc.transitioningDelegate = self
present(vc, animated: true, completion: nil)

extension UIViewController: UIViewControllerTransitioningDelegate {
    public func presentationController(forPresented presented: UIViewController, presenting: UIViewController?, source: UIViewController) -> UIPresentationController? {
        return UIPresentationController(presentedViewController: presented, presenting: presenting)
    }

    public func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
        return PresentationAnimator()
    }

    public func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
        return DismissionAnimator()
    }
}

PSPDFTouchForwardingView

final class PSPDFTouchForwardingView: UIView {

    final var passthroughViews: [UIView] = []

    override func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {
        guard let hitView = super.hitTest(point, with: event) else { return nil }
        guard hitView == self else { return hitView }

        for passthroughView in passthroughViews {
            let point = convert(point, to: passthroughView)
            if let passthroughHitView = passthroughView.hitTest(point, with: event) {
                return passthroughHitView
            }
        }

        return self
    }
}

private var touchForwardingView: PSPDFTouchForwardingView?
override func presentationTransitionWillBegin() {
    super.presentationTransitionWillBegin()
    touchForwardingView = PSPDFTouchForwardingView(frame: containerView!.bounds)
    containerView?.insertSubview(touchForwardingView, at: 0)
}

요약

참고 링크