导航栏后面的搜索栏

Question

给定3个控制器：A，B，CA具有隐藏的导航栏。 通过StoryboardReference调用控制器B。 控制器B在viewDidLoad上显示导航栏。 它具有一个搜索栏和一个collectionView。 请参阅我的情节提要的屏幕快照A。 如果单击一个单元格，则调用控制器C。

问题：如果A呼叫B，则搜索栏位于导航栏的后面（屏幕快照B）。 出现从C到B的过渡（屏幕截图C）。

导航栏已经是半透明的。 有任何想法吗？

编辑

我意识到动画过渡导致了我的问题。

也许您可以发现错误？

class ZoomInCircleViewTransition: NSObject, UIViewControllerAnimatedTransitioning, UIViewControllerTransitioningDelegate {

    var transitionContext: UIViewControllerContextTransitioning?

    func transitionDuration(transitionContext: UIViewControllerContextTransitioning?) -> NSTimeInterval {
        return 0.6
    }

    func animateTransition(transitionContext: UIViewControllerContextTransitioning) {
        self.transitionContext = transitionContext

        guard let toViewController: UIViewController = transitionContext.viewControllerForKey(UITransitionContextToViewControllerKey) else {
            return
        }

        guard let fromViewController = transitionContext.viewControllerForKey(UITransitionContextFromViewControllerKey) else {            return
        }

        guard let fromViewTransitionFromView = fromViewController as? TransitionFromViewProtocol else {
            return
        }

        let imageViewSnapshot = fromViewTransitionFromView.getViewForTransition()

        let endFrame = CGRectMake(-CGRectGetWidth(toViewController.view.frame)/2, -CGRectGetHeight(toViewController.view.frame)/2, CGRectGetWidth(toViewController.view.frame)*2, CGRectGetHeight(toViewController.view.frame)*2)

        if let containerView = transitionContext.containerView(){
            containerView.addSubview(fromViewController.view)
            containerView.addSubview(toViewController.view)
            containerView.addSubview(imageViewSnapshot)
        }


        let maskPath = UIBezierPath(ovalInRect: imageViewSnapshot.frame)
        let maskLayer = CAShapeLayer()
        maskLayer.frame = toViewController.view.frame
        maskLayer.path = maskPath.CGPath
        toViewController.view.layer.mask = maskLayer

        let quadraticEndFrame = CGRect(x: endFrame.origin.x - (endFrame.height - endFrame.width)/2, y: endFrame.origin.y, width: endFrame.height, height: endFrame.height)
        let bigCirclePath = UIBezierPath(ovalInRect: quadraticEndFrame)

        let pathAnimation = CABasicAnimation(keyPath: "path")
        pathAnimation.delegate = self
        pathAnimation.fromValue = maskPath.CGPath
        pathAnimation.toValue = bigCirclePath
        pathAnimation.duration = transitionDuration(transitionContext)
        maskLayer.path = bigCirclePath.CGPath
        maskLayer.addAnimation(pathAnimation, forKey: "pathAnimation")


        let hideImageViewAnimation =  {
            imageViewSnapshot.alpha = 0.0
        }

        UIView.animateWithDuration(0.2, delay: 0.0, options: UIViewAnimationOptions.CurveLinear, animations: hideImageViewAnimation) { (completed) -> Void in
        }

        let scaleImageViewAnimation = {
            imageViewSnapshot.frame = quadraticEndFrame
        }
        UIView.animateWithDuration(transitionDuration(transitionContext), delay: 0.0, options: UIViewAnimationOptions.CurveLinear, animations: scaleImageViewAnimation) { (completed) -> Void in
            // After the complete animations have endet
            imageViewSnapshot.removeFromSuperview()
            toViewController.view.layer.mask = nil
        }
    }

    override func animationDidStop(anim: CAAnimation, finished flag: Bool) {
        if let transitionContext = self.transitionContext {
            transitionContext.completeTransition(!transitionContext.transitionWasCancelled())
        }
    }

    // MARK: UIViewControllerTransitioningDelegate protocol methods

    // return the animataor when presenting a viewcontroller
    func animationControllerForPresentedController(presented: UIViewController, presentingController presenting: UIViewController, sourceController source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
        return self
    }

    // return the animator used when dismissing from a viewcontroller
    func animationControllerForDismissedController(dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
        return self
    }
}

Answer 1

我相信我在应用程序中遇到了一些类似的问题，但是由于所有您无法控制的事情而遇到了困难。 我的解决方案是在导航栏中放置一个搜索图标，然后使搜索控制器在导航栏上向下滑动，以使其保持在表格/滚动视图之外。 这是我的实现（应该完整）

import UIKit

class tvc: UITableViewController, UISearchBarDelegate, UISearchControllerDelegate {

var searchController:UISearchController!

@IBAction func startSearch() {
    self.navigationController?.presentViewController(self.searchController, animated: true, completion: {})
}

override func viewDidDisappear(animated: Bool) {
    cancelSearch(self)
}

override func viewDidLoad() {
    super.viewDidLoad()

    searchController = UISearchController(searchResultsController: nil)
    searchController.searchResultsUpdater = self
    searchController.dimsBackgroundDuringPresentation = false
    searchController.delegate = self
    searchController.hidesNavigationBarDuringPresentation = false
    searchController.loadViewIfNeeded()  /* Fixes bug in iOS http://stackoverflow.com/questions/32675001/uisearchcontroller-warning-attempting-to-load-the-view-of-a-view-controller */
    definesPresentationContext = true
    tableView.sectionIndexBackgroundColor = UIColor.clearColor()
    tableView.sectionIndexTrackingBackgroundColor = UIColor.clearColor()
}

---

extension tvc: UISearchResultsUpdating {
// MARK: - UISearchResultsUpdating Delegate
func updateSearchResultsForSearchController(searchController: UISearchController) {
    filterContentForSearchText(searchController.searchBar.text!)
    }
}

---

func cancelSearch(sender: AnyObject?) {
if sender!.searchController.active == true {
sender?.searchController.resignFirstResponder()
sender!.navigationController!!.dismissViewControllerAnimated(false, completion: {})
sender!.searchController.searchBar.text = ""
sender!.searchController.active = false
    }
}

Answer 2

我认为问题是您是不是为imageViewSnapshot设置框架还是设置了错误的框架。 由于imageViewSnapshot包含搜索栏，因此您必须设置框架，使其位于导航栏的后面。 或imageViewSnapshot应该只包含fromViewTransitionFromView的可见区域。