How to Animate Add Uisearchbar on Top of Uinavigationbar

UISearchBar dismiss animation issue

From the code you posted on GitHub I could find a way to avoid the gap, obviously a matter of animation timing.

In your FirstTableViewController.swift you need to register as a delegate of UISearchBar, then trigger yourself the appearing of the navigationBar the earlier possible when the searchBar dismisses (as soon as the text editing ends) with the delegate method searchBarTextDidEndEditing:

Here is your final swift file with 2 additions : the UISearchBarDelegate on line 3, and the function searchBarTextDidEndEditing at the end :

import UIKit

class FirstTableViewController: UITableViewController, UISearchBarDelegate {

    var entries: NSArray = ["Foo", "Bar"];

    override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return self.entries.count
    }

    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

        let cell = self.tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as UITableViewCell

        cell.textLabel?.text = entries[indexPath.row] as? String

        return cell
    }

    override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
        performSegueWithIdentifier("test", sender: nil)
    }

    // Fix searchbar disappear bug

    func searchDisplayControllerDidEndSearch(controller: UISearchDisplayController) {
        self.tableView.insertSubview(self.searchDisplayController!.searchBar, aboveSubview: self.tableView)
    }

    func searchBarTextDidEndEditing(searchBar: UISearchBar) {
        self.navigationController?.setNavigationBarHidden(false, animated: true)
    }

}

EDIT - by adjusting the proper layout options in IB, both viewcontrollers work.

First : The 3 checked options for the TableViews are in Drawing: Opaque + Clears Graphics Context + Autoresize Subviews

Second : For the ViewController itself the Extended Edges checked options are: Under Bottom Bars + Under Opaque Bars

And third : the code above about UISearchBar Delegation...

UISearchBar with hidden UINavigationBar

Finnaly!!!! I've found the solution IPHONE: ABPeoplePickerNavigationController hidden navigation bar

UISearchBar in navigationbar

To put searchBar into the center of navigationBar:

self.navigationItem.titleView = self.searchBarTop;

To put searchBar to the left/right side of navigationBar:

UIBarButtonItem *searchBarItem = [[UIBarButtonItem alloc] initWithCustomView:searchBar];
self.navigationItem.rightBarButtonItem = searchBarItem;

Broken UISearchBar animation embedded in NavigationItem

It looks like Apple still needs to iron out the use of the UISearchBar in the new large title style. If the UIViewController you push to doesn't have its navigationItem.searchController set, the animation works fine. When navigating between two instances of UIViewController that both have a searchController set, you get the issue you describe where the height of the navigation bar jumps.

You can solve (work around) the problem by creating the UISearchController every time viewDidAppear gets called (instead of creating it in loadView) and setting navigationItem.searchController to nil on viewDidDisappear.

override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)

    DispatchQueue.main.async {
        let stvc = UITableViewController()
        stvc.tableView.dataSource = self

        let sc = UISearchController(searchResultsController: stvc)
        sc.searchResultsUpdater = self
        self.navigationItem.searchController = sc
    }
}

override func viewDidDisappear(_ animated: Bool) {
    super.viewDidDisappear(animated)

    self.navigationItem.searchController = nil
}

The reason for the asynchronous dispatch is that when setting the navigationItem.searchController inline in the viewDidAppear method, an exception is raised:

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Only one palette with a top boundary edge can be active outside of a transition. Current active palette is <_UINavigationControllerManagedSearchPalette: 0x7fad67117e80; frame = (0 116; 414 0); layer = <CALayer: 0x60400002c8e0>>'

I know this is only a work around, but hopefully this will help you for now, until Apple solves the issue with navigating between two view controllers that both have a UISearchController set on their navigationItem.

UISearchbar squished in UINavigationbar

I recently needed to solve the same issue. I ended up creating a UIBarButtonItem with the back button image asset, and setting that as the navigationItem.leftBarButtonItem. This button press then calls navigationController?.popViewController(animated: true) to pop the viewController off the stack

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