iOS 11 Search Bar Jumping to Top of Screen

iOS 11 search bar jumping to top of screen

It is encouraged to apply the new way to show search bar/search controller on iOS 11.
Here is what I have done:

    if #available(iOS 11.0, *) {
        navigationItem.searchController = searchController
    } else {
        tableView.tableHeaderView = searchController.searchBar
    }

iOS 11 search bar in tableViewHeader jumps to the top of the screen on focus

Since iOS11, search control is part of navigation bar. You will need something like the following

Objective-C

if (@available(iOS 11.0, *)) {
self.navigationItem.searchController = searchController
} else {
self.tableView.tableHeaderView = searchController.searchBar
}


Swift

if #available(iOS 11.0, *) {

Search bar overlaps with status bar on iOS 11

I found that the problem was that the presenting view Controller also sets

override open func viewDidLoad() {
    super.viewDidLoad()
    self.edgesForExtendedLayout = [];
    self.automaticallyAdjustsScrollViewInsets = false;
}

I have to do this because the table view does not actually extend all the way to the top.

I solved this like that in my presenting view Controller:

override open func viewDidLoad() {
    super.viewDidLoad()
    self.automaticallyAdjustsScrollViewInsets = false;
    if (@available(iOS 11.0, *)) {
        //NSLog(@"iOS 11.0");
    } else {
        self.edgesForExtendedLayout = UIRectEdgeNone;
        //NSLog(@"iOS < 11.0");
    }
}

Seems to be an iOS 11 bug, or at least an odd behavior…

UISearchBar jumping out of position once tapped

The solution I used was to subclass the UISearchBar and the UISearchController. That way I can set the frame and control the search bar events.

SearchBar.swift:

import Foundation

class SearchBar : UISearchBar {

    var preferredFont:UIFont?
    var preferredTextColor:UIColor?

    init(frame: CGRect, font: UIFont, textColor: UIColor) {
        super.init(frame: frame)

        self.frame = frame
        self.preferredFont = font
        self.preferredTextColor = textColor
    }

    required init(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)!
    }
}

SearchController.swift:

import Foundation

protocol SearchControllerDelegate {
    func didStartSearching()

    func didTapOnSearchButton()

    func didTapOnCancelButton()

    func didChangeSearchText(searchText: String)
}

class SearchController : UISearchController, UISearchBarDelegate, SearchControllerDelegate {

    var customSearchBar: SearchBar!
    var customDelegate: SearchControllerDelegate!

    init(searchResultsController: UIViewController!, searchBarFrame: CGRect, searchBarFont: UIFont, searchBarTextColor: UIColor, searchBarTintColor: UIColor) {
        super.init(searchResultsController: searchResultsController)
        configureSearchBar(frame: searchBarFrame, font: searchBarFont, textColor: searchBarTextColor, bgColor: searchBarTintColor)
    }

    override init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: Bundle?) {
        super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil)
    }

    required init(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)!
    }

    func configureSearchBar(frame: CGRect, font: UIFont, textColor: UIColor, bgColor: UIColor) {
        self.customSearchBar = SearchBar(frame: frame, font: font , textColor: textColor)

        self.customSearchBar.placeholder = "Search"
        self.customSearchBar.barTintColor = bgColor
        self.customSearchBar.tintColor = textColor
        self.customSearchBar.showsBookmarkButton = false
        self.customSearchBar.showsCancelButton = false

        self.customSearchBar.delegate = self
        self.customDelegate = self;

        let searchBarTextField:UITextField = self.customSearchBar.value(forKey: "searchField") as! UITextField

        searchBarTextField.font = font
        searchBarTextField.layer.borderWidth = 1
        searchBarTextField.layer.cornerRadius = 3
        searchBarTextField.layer.borderColor = UIColor.lightGray.cgColor
    }

    // UISearchBarDelegate

    func searchBarTextDidBeginEditing(_ searchBar: UISearchBar) {
        customDelegate.didStartSearching()
    }

    func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {
        customSearchBar.resignFirstResponder()
        customDelegate.didTapOnSearchButton()
    }

    func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
        customSearchBar.resignFirstResponder()
        customDelegate.didTapOnCancelButton()
    }

    func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
        customDelegate.didChangeSearchText(searchText: searchText)
    }

    // SearchControllerDelegate

    func didStartSearching() {

    }

    func didTapOnSearchButton() {
        var searchText:String = ""

        if (self.customSearchBar.text != nil) {
            searchText = self.customSearchBar.text!
        }

        self.search(searchQuery: searchText)
    }

    func didTapOnCancelButton() {

    }

    func didChangeSearchText(searchText: String) {
        self.search(searchQuery: searchText)
    }

    // Search
    func search(searchQuery: String) {
        // Start searching
    }
}

UISearchController's UISearchBar shifts incorrectly and jumps when UITableView is scrolled

What you have done is correct. Did you try running your code in a device? Feels more like a glitch in the simulator. I tried what you tried and it works fine for me in the device. Whereas the glitch occurs in simulator.

Refer to this article. They have explained step by step process.

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