UISearchBar increases navigation bar height in iOS 11

Question

I have my UISearchBar being part of the navigation bar like:

 let searchBar = UISearchBar()
 //some more configuration to the search bar
 .....
         


        

Answer 1

You can add a constraint of height 44 to the search bar for iOS 11.

// Swift

if #available(iOS 11.0, *) {
    searchBar.heightAnchor.constraint(equalToConstant: 44).isActive = true
}

// Objective-C

if (@available(iOS 11.0, *)) {
    [searchBar.heightAnchor constraintEqualToConstant:44].active = YES;
}

Answer 2

In my case, bigger UINavigationBar's height wasn't a problem for me. I just needed to realign left and right bar button items. That's the solution i've come up with:

- (void)iOS11FixNavigationItemsVerticalAlignment
{
    [self.navigationController.navigationBar layoutIfNeeded];

    NSString * currSysVer = [[UIDevice currentDevice] systemVersion];
    if ([currSysVer compare:@"11" options:NSNumericSearch] != NSOrderedAscending)
    {
        UIView * navigationBarContentView;
        for (UIView * subview in [self.navigationController.navigationBar subviews])
        {
            if ([subview isKindOfClass:NSClassFromString(@"_UINavigationBarContentView")])
            {
                navigationBarContentView = subview;
                break;
            }
        }

        if (navigationBarContentView)
        {
            for (UIView * subview in [navigationBarContentView subviews])
            {
                if (![subview isKindOfClass:NSClassFromString(@"_UIButtonBarStackView")]) continue;

                NSLayoutConstraint * topSpaceConstraint;
                NSLayoutConstraint * bottomSpaceConstraint;

                CGFloat topConstraintMultiplier = 1.0f;
                CGFloat bottomConstraintMultiplier = 1.0f;

                for (NSLayoutConstraint * constraint in navigationBarContentView.constraints)
                {
                    if (constraint.firstItem == subview && constraint.firstAttribute == NSLayoutAttributeTop)
                    {
                        topSpaceConstraint = constraint;
                        break;
                    }

                    if (constraint.secondItem == subview && constraint.secondAttribute == NSLayoutAttributeTop)
                    {
                        topConstraintMultiplier = -1.0f;
                        topSpaceConstraint = constraint;
                        break;
                    }
                }

                for (NSLayoutConstraint * constraint in navigationBarContentView.constraints)
                {
                    if (constraint.firstItem == subview && constraint.firstAttribute == NSLayoutAttributeBottom)
                    {
                        bottomSpaceConstraint = constraint;
                        break;
                    }

                    if (constraint.secondItem == subview && constraint.secondAttribute == NSLayoutAttributeBottom)
                    {
                        bottomConstraintMultiplier = -1.0f;
                        bottomSpaceConstraint = constraint;
                        break;
                    }
                }

                CGFloat contentViewHeight = navigationBarContentView.frame.size.height;
                CGFloat subviewHeight = subview.frame.size.height;
                topSpaceConstraint.constant = topConstraintMultiplier * (contentViewHeight - subviewHeight) / 2.0f;
                bottomSpaceConstraint.constant = bottomConstraintMultiplier * (contentViewHeight - subviewHeight) / 2.0f;
            }
        }
    }
}

Basically, we search for stack views that contain bar button items and then changing their's top and bottom constraints values. Yeah, it's a dirt hack, and won't recommend to use it if you can fix your issue in any other way.

Answer 3

In my case, I have to decrease the textField's height 36pt -> 28pt.

So I tried to change the frame's height, layer's height. But the ways didn't work.

Finally, I found a solution that's the mask. I think, It's not a good way but it works.

    let textField              = searchBar.value(forKey: "searchField") as? UITextField
    textField?.font            = UIFont.systemFont(ofSize: 14.0, weight: .regular)
    textField?.textColor       = #colorLiteral(red: 0.1960784314, green: 0.1960784314, blue: 0.1960784314, alpha: 1)
    textField?.textAlignment   = .left

    if #available(iOS 11, *) {
        let radius: CGFloat           = 5.0
        let magnifyIconWidth: CGFloat = 16.0
        let inset                     = UIEdgeInsets(top: 4.0, left: 0, bottom: 4.0, right: 0)

        let path = CGMutablePath()
        path.addArc(center: CGPoint(x: searchBar.bounds.size.width - radius - inset.right - magnifyIconWidth, y: inset.top + radius), radius: radius, startAngle: .pi * 3.0/2.0, endAngle: .pi*2.0, clockwise: false)                        // Right top
        path.addArc(center: CGPoint(x: searchBar.bounds.size.width - radius - inset.right - magnifyIconWidth, y: searchBar.bounds.size.height - radius - inset.bottom), radius: radius, startAngle: 0, endAngle: .pi/2.0, clockwise: false)  // Right Bottom
        path.addArc(center: CGPoint(x: inset.left + radius, y: searchBar.bounds.size.height - radius - inset.bottom), radius: radius, startAngle: .pi/2.0, endAngle: .pi, clockwise: false)                                                  // Left Bottom
        path.addArc(center: CGPoint(x: inset.left + radius, y: inset.top + radius),  radius: radius, startAngle: .pi, endAngle: .pi * 3.0/2.0, clockwise: false)                                                                             // Left top

        let maskLayer      = CAShapeLayer()
        maskLayer.path     = path
        maskLayer.fillRule = kCAFillRuleEvenOdd

        textField?.layer.mask = maskLayer
    }

You can change the insets, if you want to change the textField's frame.

Answer 4

//
//  Created by Sang Nguyen on 10/23/17.
//  Copyright © 2017 Sang. All rights reserved.
//

import Foundation
import UIKit

class CustomSearchBarView: UISearchBar {
    final let SearchBarHeight: CGFloat = 44
    final let SearchBarPaddingTop: CGFloat = 8
    override open func awakeFromNib() {
        super.awakeFromNib()
        self.setupUI()
    }

    override init(frame: CGRect) {
        super.init(frame: frame)
        self.setupUI()
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
       // fatalError("init(coder:) has not been implemented")
    }
    func findTextfield()-> UITextField?{
        for view in self.subviews {
            if view is UITextField {
                return view as? UITextField
            } else {
                for textfield in view.subviews {
                    if textfield is UITextField {
                        return textfield as? UITextField
                    }
                }
            }
        }
        return nil;
    }
    func setupUI(){
        if #available(iOS 11.0, *) {
            self.translatesAutoresizingMaskIntoConstraints = false
            self.heightAnchor.constraint(equalToConstant: SearchBarHeight).isActive = true
        }
    }

    override func layoutSubviews() {
        super.layoutSubviews()
        if #available(iOS 11.0, *) {
            if let textfield = self.findTextfield() {
                textfield.frame = CGRect(x: textfield.frame.origin.x, y: SearchBarPaddingTop, width: textfield.frame.width, height: SearchBarHeight - SearchBarPaddingTop * 2)`enter code here`
                return
            }
        }
    }
}

Answer 5

This happen to me too, all running well in iOS 12.4 and getting weird in 13 above. The problem is in iOS 13 navigation bar height increase from 88 to 100 after jump from UIViewController that implement searchBar.

Try this in your UIViewController that implement searchBar.

override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(animated)
    navigationController?.view.setNeedsLayout()
    navigationController?.view.layoutIfNeeded()
}

Preview after fixing:

Preview before fixing:

Answer 6

Hi to the people who uses UISearchController and then attaching its UISearchBar to the navigationItem.titleView. I've spend a crazy 4-5 hours of my day to solve this. Following the iOS 11+ recommended approach, which is putting the searchController to the navigation.searchController is not just right for my case. The screen that has this searchController/searchBar has a backButton, a custom one.

I have tested this in iOS 10, iOS 11, and 12. In different devices. I just had to. I can't go home without solving this demon. This is the most perfect I could do for today, given my tight deadline.

So I just wanna share this hard work that I did, it's up to you to put everything into where ever you want (ex. variables in your viewModel). Here it goes:

In my first screen (say home screen, that does not have this search controller), I have this in my viewDidLoad().

self.extendedLayoutIncludesOpaqueBars = true

In my second screen, the one that has the searchController, I have this in my viewDidAppear.

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

    let systemMajorVersion = ProcessInfo.processInfo.operatingSystemVersion.majorVersion
    if systemMajorVersion < 12 {
        // Place the search bar in the navigation item's title view.
        self.navigationItem.titleView = self.searchController.searchBar
    }

    if systemMajorVersion >= 11 {

        self.extendedLayoutIncludesOpaqueBars = true

        UIView.animate(withDuration: 0.3) {
            self.navigationController?.navigationBar.setNeedsLayout()
            self.navigationController?.navigationBar.layoutIfNeeded()
        }

        self.tableView.contentInset = UIEdgeInsets(top: -40, left: 0, bottom: 0, right: 0)

        if self.viewHadAppeared {
            self.tableView.contentInset = .zero
        }
    }

    self.viewHadAppeared = true // this is set to false by default.
}

and here's my searchController's declaration:

lazy var searchController: UISearchController = {
    let searchController = UISearchController(searchResultsController: nil)
    searchController.hidesNavigationBarDuringPresentation = false
    searchController.dimsBackgroundDuringPresentation = false
    searchController.searchBar.textField?.backgroundColor = .lalaDarkWhiteColor
    searchController.searchBar.textField?.tintColor = .lalaDarkGray
    searchController.searchBar.backgroundColor = .white
    return searchController
}()

So I hope this helps someone someday.