ios - 导航栏后面的搜索栏

Question

给定 3 个 Controller :A、B、CA 有一个隐藏的导航栏。通过 StoryboardReference 调用 Controller B。 Controller B 在 vi​​ewDidLoad 上显示导航栏。它有一个搜索栏和一个collectionView。请参阅我的 Storyboard的屏幕截图 A。如果单击单元格，则调用 Controller C。

问题:如果 A 调用 B，则搜索栏位于导航栏后面(屏幕截图 B)。它出现在从 C 到 B 的过渡中(屏幕截图 C)。

导航栏已经是半透明的。有什么想法吗？

编辑

我意识到我的动画过渡导致了我的问题。

也许你能发现错误？

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

我相信我在我的应用程序中遇到了一些类似的问题，但由于您无法控制的所有事情而遇到了困难。我的解决方案是在导航栏中放置一个搜索图标，然后让搜索 Controller 在导航栏上向下滑动，使其远离表格/ ScrollView 。这是我的实现(应该是完整的)

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
    }
}