将 UIWebView 上的 ScreenEdgePanGesture 传递给父 PageViewController

Question

我正在嵌入 Google 全角导航地图 UIWebView，它本身嵌入在 UIPageViewController 中（在滚动模式下）。页面控制器响应所有页面上的翻页手势，即使在 UIWebView、内，除非 UIWebView 已加载 Google 地图。很明显，这是因为网页拦截了pan/swipe这个手势。我希望允许网页内的所有平移和交互，除非手势是边缘滑动。如果无法进行边缘滑动，则靠近边缘的平移手势也是可以接受的。

我可以在页面上添加 ScreenEdgePanGestureRecognizer 和 segue，但这会将我置于 UIPageView 之外。我希望该解决方案是可扩展的，因为它不会转到特定页面（例如 pageViewController.setViewControllers），而只是允许 UIPageViewController 转换到 next/previous 页面。

这是我目前拦截手势的方式。

var leftScreenPanGestureRecognizer = UIScreenEdgePanGestureRecognizer(target: self, action: #selector(self.handleMapSwipe(_:))) leftScreenPanGestureRecognizer.edges = .Left leftScreenPanGestureRecognizer.cancelsTouchesInView = true self.view.addGestureRecognizer(leftScreenPanGestureRecognizer) self.webView.addGestureRecognizer(leftScreenPanGestureRecognizer) if let location = locationManager.location?.coordinate { let lat = location.latitude let long = location.longitude webView.loadRequest(NSURLRequest(URL: NSURL(string: "https://www.google.com/maps/place/\(lat),\(long)/")!)) } else { webView.loadRequest(NSURLRequest(URL: NSURL(string: "https://www.google.com/maps/")!)) }

问题是：如何让 UIPageViewController 只拦截相关的手势。或者拦截手势然后以可扩展的方式将其传递给 UIPageViewController。

Answer 1

在了解了 self.parentViewController

之后，我找到了一种以可扩展的方式处理此问题的方法

@IBAction func handleMapBackwardSwipe(recognizer: UIScreenEdgePanGestureRecognizer) {
    if (recognizer.state == .Began) {
        webView.scrollView.scrollEnabled = true
    } else if(recognizer.state == .Ended || recognizer.state == .Cancelled){
        webView.scrollView.scrollEnabled = false
    }

    // PageViewController is the controlling class for the UIPageViewController on the storyboard.
    let pvc = (self.parentViewController as! PageViewController)
    let newView = pvc.pageViewController(pvc, viewControllerBeforeViewController: self)
    if let newView = newView {
        pvc.setViewControllers([newView], direction: .Reverse, animated: true, completion: nil)
    }
}

@IBAction func handleMapForwardSwipe(recognizer: UIScreenEdgePanGestureRecognizer) {
    if (recognizer.state == .Began) {
        webView.scrollView.scrollEnabled = true
    } else if(recognizer.state == .Ended || recognizer.state == .Cancelled){
        webView.scrollView.scrollEnabled = false
    }

    let pvc = (self.parentViewController as! PageViewController)
    let newView = pvc.pageViewController(pvc, viewControllerAfterViewController: self)
    if let newView = newView {
        pvc.setViewControllers([newView], direction: .Forward, animated: true, completion: nil)
    }
}

将 UIWebView 上的 ScreenEdgePanGesture 传递给父 PageViewController

Pass ScreenEdgePanGesture on UIWebView to parent PageViewController

uiwebview

uigesturerecognizer

ios

uipageviewcontroller

swift