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[iOS] UIScrollViewの中のViewControllerでもジェスチャーさせる

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Last updated at Posted at 2017-05-12

以下、今回の構成。

ContainerViewController に UIScrollView がある
└ NavigationViewController(ScrollViewの中にあるContainerView内に設定)
 └ ParentViewController
  └ ChildViewController ─ swipeRecognizerToLeft(左スワイプのジェスチャー)
             └ swipeRecognizerToRight(右スワイプのジェスチャー)

let parentVc = self.navigationController?.viewControllers[0]
let NavigationVc = parentVc?.parent
let containerVc = NavigationVc?.parent as? ContainerViewController

containerVc?.scrollView.gestureRecognizers?.forEach({ gesture in
    gesture.require(toFail: swipeRecognizerToLeft)
    gesture.require(toFail: swipeRecognizerToRight)
})
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