導航欄后面的搜索欄

Question

給定3個控制器：A，B，CA具有隱藏的導航欄。 通過StoryboardReference調用控制器B。 控制器B在viewDidLoad上顯示導航欄。 它具有一個搜索欄和一個collectionView。 請參閱我的情節提要的屏幕快照A。 如果單擊一個單元格，則調用控制器C。

問題：如果A呼叫B，則搜索欄位於導航欄的后面（屏幕快照B）。 出現從C到B的過渡（屏幕截圖C）。

導航欄已經是半透明的。 有任何想法嗎？

編輯

我意識到動畫過渡導致了我的問題。

也許您可以發現錯誤？

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

我相信我在應用程序中遇到了一些類似的問題，但是由於所有您無法控制的事情而遇到了困難。 我的解決方案是在導航欄中放置一個搜索圖標，然后使搜索控制器在導航欄上向下滑動，以使其保持在表格/滾動視圖之外。 這是我的實現（應該完整）

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

我認為問題是您是不是為imageViewSnapshot設置框架還是設置了錯誤的框架。 由於imageViewSnapshot包含搜索欄，因此您必須設置框架，使其位於導航欄的后面。 或imageViewSnapshot應該只包含fromViewTransitionFromView的可見區域。