UISearchBar 增加了 iOS11中导航栏的高度

EDIT: The @zgjie answer is a better solution for this problem: https://stackoverflow.com/a/46356265/1713123

It seems this happens because in iOS 11 the default height value of SearchBar was changed to 56, instead 44 on previous iOS versions.

For now, I've applied this workaround, setting searchBar height back to 44:

let barFrame = searchController.searchBar.frame
searchController.searchBar.frame = CGRect(x: 0, y: 0, width: barFrame.width, height: 44)

Another solution could be use the new searchController property on navigationItem in iOS 11:

navigationItem.searchController = searchController

But this way da searchBar appears below navigation title.

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;
}

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.

I believe in iOS 11 UISearchBar now has the height equals to 56, and UINavigationBar uses autolayout to fit its subviews hence it increases the height. If you still want to have UISearchBar as titleView as in pre-iOS 11, I found out the best way to do it is to embed UISearchBar in a custom view, and set this view's height to 44, and assign it to navigationItem.titleView

class SearchBarContainerView: UIView {


let searchBar: UISearchBar


init(customSearchBar: UISearchBar) {
searchBar = customSearchBar
super.init(frame: CGRect.zero)


addSubview(searchBar)
}


override convenience init(frame: CGRect) {
self.init(customSearchBar: UISearchBar())
self.frame = frame
}


required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}


override func layoutSubviews() {
super.layoutSubviews()
searchBar.frame = bounds
}
}


class MyViewController: UIViewController {


func setupNavigationBar() {
let searchBar = UISearchBar()
let searchBarContainer = SearchBarContainerView(customSearchBar: searchBar)
searchBarContainer.frame = CGRect(x: 0, y: 0, width: view.frame.width, height: 44)
navigationItem.titleView = searchBarContainer
}
}

In Objective-C

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

I tried various things to get the size back to the original 44, but then the search bar always looks and behaves weird - like being to far stretched, y-offset and alike.

I found a nice solution here (via some other stackoverflow post): https://github.com/DreamTravelingLight/searchBarDemo

Just derive your viewcontroller from the SearchViewController and include in your project the SearchViewController and WMSearchbar classes. Worked out of the box for me without any ugly if (iOS11) else... uglyness.

//
//  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
}
}
}
}

All solution didn't work for me so before I pushed view controller I did:

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


self.navigationItem.titleView = UIView()
}

And to make search bar present when going back:

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


self.navigationItem.titleView = UISearchBar()
}

I found Mai Mai's solution to be the only one that's really usable.
However it's still not perfect:
When rotating the device, the search bar is not properly resized and remains in the smaller dimension.

I have found a fix for that. Here is my code in Objective C with the relevant parts annotated:

// improvements in the search bar wrapper
@interface SearchBarWrapper : UIView
@property (nonatomic, strong) UISearchBar *searchBar;
- (instancetype)initWithSearchBar:(UISearchBar *)searchBar;
@end
@implementation SearchBarWrapper
- (instancetype)initWithSearchBar:(UISearchBar *)searchBar {
// setting width to a large value fixes stretch-on-rotation
self = [super initWithFrame:CGRectMake(0, 0, 4000, 44)];
if (self) {
self.searchBar = searchBar;
[self addSubview:searchBar];
}
return self;
}
- (void)layoutSubviews {
[super layoutSubviews];
self.searchBar.frame = self.bounds;
}
// fixes width some cases of resizing while search is active
- (CGSize)sizeThatFits:(CGSize)size {
return size;
}
@end


// then use it in your VC
@implementation MyViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.navigationItem.titleView = [[SearchBarWrapper alloc] initWithSearchBar:self.searchController.searchBar];
}
@end

Now there is still one case left that I haven't figured out yet. To reproduce do the following:
- start in portrait
- activate search field
- rotate to landscape
- error: the bar doesn't resize

try this code on "ACKNOWLEDGEMENTS" view controller in viewDidLoad

self.extendedLayoutIncludesOpaqueBars = true

I couldn't use the solution of keeping the navBar at 44. So it took me a day but finally, I found a solution that doesn't change the bar height and position the button in the middle of the bar. The issue is that the buttons are placed in a stack view which is configured as Horizontal stack view and therefore doesn't adjust to the height change.

This is done on init:

UIBarButtonItem *cancelButton;
if (@available(iOS 11.0, *)) {
// For iOS11 creating custom button to accomadate the change of navbar + search bar being 56 points
self.navBarCustomButton = [UIButton buttonWithType:UIButtonTypeCustom];
[self.navBarCustomButton setTitle:@"Cancel"];
[self.navBarCustomButton addTarget:self action:@selector(cancelButtonTapped) forControlEvents:UIControlEventTouchUpInside];
cancelButton = [[UIBarButtonItem alloc] initWithCustomView:self.navBarCustomButton];
} else {
cancelButton = [[UIBarButtonItem alloc] initWithTitle:MagicLocalizedString(@"button.cancel", @"Cancel")
style:UIBarButtonItemStylePlain
target:self
action:@selector(cancelButtonTapped)];
}

on viewWillApear (or anytime after the view was added to the navigation stack)

   if (@available(iOS 11.0, *)) {
UIView *buttonsStackView = [navigationController.navigationBar subviewOfClass:[UIStackView class]];
if (buttonsStackView ) {
[buttonsStackView.centerYAnchor constraintEqualToAnchor:navigationController.navigationBar.centerYAnchor].active = YES;
[self.navBarCustomButton.heightAnchor constraintEqualToAnchor:buttonsStackView.heightAnchor];
}
}

And subviewOfClass is a category on UIView:

- (__kindof UIView *)subviewOfClass:(Class)targetClass {
// base case
if ([self isKindOfClass:targetClass]) {
return self;
}


// recursive
for (UIView *subview in self.subviews) {
UIView *dfsResult = [subview subviewOfClass:targetClass];


if (dfsResult) {
return dfsResult;
}
}
return nil;
}

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.

I got black line under NavigationBar with SearchBar in iOS 11 in two cases:

• when i pushed another ViewControllers from ViewController with UISearchBar

• when i dismissed ViewController with UISearchBar with "drag right to dismiss"

My solution was: adding this code to my ViewController with UISearchBar:

-(void)viewWillDisappear:(BOOL)animated{
[super viewWillDisappear:animated];
[self.navigationController.view setNeedsLayout]; // force update layout
[self.navigationController.view layoutIfNeeded]; // to fix height of the navigation bar
}

Swift 4 Update

override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
navigationController?.view.setNeedsLayout() // force update layout
navigationController?.view.layoutIfNeeded() // to fix height of the navigation bar
}

I fixed this by added the constraint to viewDidAppear on the map view controller where the search bar is embedded

public override func viewDidAppear(_ animated: Bool) {
if #available(iOS 11.0, *) {


resultSearchController?.searchBar.heightAnchor.constraint(equalToConstant: 44).isActive = true
// searchBar.heightAnchor.constraint(equalToConstant: 44).isActive = true
}
}

All you have to do is to subclass UISearchBar and override "intrinsicContentSize":

@implementation CJSearchBar
-(CGSize)intrinsicContentSize{
CGSize s = [super intrinsicContentSize];
s.height = 44;
return s;
}
@end

Thank you all! I finally found a solution.

Adding the following code to ViewController with UISearchBar.

1. First step: viewDidLoad

-(void)viewDidLoad
{
[super viewDidLoad];
self.extendedLayoutIncludesOpaqueBars = YES;
...
}

override func viewDidLoad() {
super.viewDidLoad()
self.extendedLayoutIncludesOpaqueBars = true
}

2. Second step:viewWillDisappear

-(void)viewWillDisappear:(BOOL)animated{
[super viewWillDisappear:animated];
// force update layout
[self.navigationController.view setNeedsLayout];
// to fix height of the navigation bar
[self.navigationController.view layoutIfNeeded];
}

    override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
navigationController?.view.setNeedsLayout() // force update layout
navigationController?.view.layoutIfNeeded() // to fix height of the navigation bar
}

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.

Unable to comment, but wanted to share some additional issues I ran into while spending many hours trying to get to the bottom of this issue even after using one of the other solutions.

It appears the best fix for me was Andrew's answer:

override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
navigationController?.view.setNeedsLayout() // force update layout
navigationController?.view.layoutIfNeeded() // to fix height of the navigation bar
}

However, at the very least in iOS 12.1, if your UINavigationBar:

• has isTranslucent set to false, the View Controller with the search bar appears to not get it's view's layout adjusted back when interactively dismissing (normal dismissing via back button appears to work).
• has it's background image set using setBackgroundImage(UIImage(), for: .default), the transition animation doesn't work properly and will jump back to its position after finishing.

These particular properties were set to get the Navigation Bar to appear in a certain way however, so I need to do some adjusting to get it back, or put up with the weird behaviour. Will try to remember to update the above if I run into anything else or find other solutions or differences in other OS versions.

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: