How to change background color of the text field in the UISearchController?

问题

How to change the default grey background at UISearchController search text field?

回答1:

Here is a an example on how to set the textField background.

class ViewController: UIViewController {

    let searchController = UISearchController(searchResultsController: nil)

    private lazy var searchTextField: UITextField? = { [unowned self] in
        var textField: UITextField?
        self.searchController.searchBar.subviews.forEach({ view in
            view.subviews.forEach({ view in
                if let view  = view as? UITextField {
                    textField = view
                }
            })
        })
        return textField
    }()

    override func viewDidLoad() {
        super.viewDidLoad()

        searchController.obscuresBackgroundDuringPresentation = false
        searchController.searchBar.placeholder = "Search Candies"
        navigationItem.searchController = searchController
        definesPresentationContext = true

        if let bg = self.searchTextField?.subviews.first {
            bg.backgroundColor = .green
            bg.layer.cornerRadius = 10
            bg.clipsToBounds = true
        }
    }
}

Result

回答2:

To update background of UISearchController proper way is change background image.

If you see UISearchController in visual debugger you can find out that background of it is UIImageView:

So you should make small image of your search bar and set it to seachBar like this:

    lazy var searchController: UISearchController = {

        let searchController = UISearchController(searchResultsController: nil)

        searchController.searchBar.placeholder = "Search"
        searchController.searchBar.tintColor = UIColor.black
        searchController.searchBar.searchBarStyle = .minimal
        // Set background image to searchBar so it will resize
        searchController.searchBar.setSearchFieldBackgroundImage(UIImage(named: "oval_static"), for: .normal)

        definesPresentationContext = true

        return searchController
    }()

The image of searchBar (in project I recommend use .pdf or .png format of image here just screenshot):

The UISearchBar will resize it as need it and result is:

Moreover we can do something like this to create custom background just in code:

/// Just random extension to make image from UIView, you can use your own
extension UIView {

func asImage() -> UIImage {
    let renderer = UIGraphicsImageRenderer(bounds: bounds)
    return renderer.image { rendererContext in
        layer.render(in: rendererContext.cgContext)
    }
}}

lazy var searchController: UISearchController = {

        let searchController = UISearchController(searchResultsController: nil)

        searchController.searchBar.placeholder = "Search"
        searchController.searchBar.tintColor = UIColor.black
        searchController.searchBar.searchBarStyle = .minimal

        // Create own view with custom properties
        // Default height is 36 points
        let differentColorSearchBar = UIView(frame: CGRect(x: 0, y: 0, width: 10, height: 36))

        differentColorSearchBar.layer.cornerRadius = 8
        differentColorSearchBar.clipsToBounds = true
        differentColorSearchBar.backgroundColor = UIColor.blue

        searchController.searchBar.setSearchFieldBackgroundImage(differentColorSearchBar.asImage(), for: .normal)

        definesPresentationContext = true

        return searchController
    }

The Result is (of course you can change another properties of searchBar to make it better, but I just show you how change background properly):

I recommend avoid private properties just use open! Hope it's help.

回答3:

I do it in this way, Objective-C code:

UITextField *searchField = [_navigationSearchBar valueForKey:@"searchField"];
searchField.backgroundColor = [UIColor defaultSeacrhBarColor];
searchField.textColor = [UIColor defaultWhiteColor];
searchField.attributedPlaceholder = [[NSAttributedString alloc] initWithString:searchTitle];
UILabel *placeholderLabel = [searchField valueForKey:@"placeholderLabel"];
placeholderLabel.textColor = [UIColor lightTextColor];

UIButton *clearButton = [searchField valueForKey:@"clearButton"];
[clearButton setImage:[clearButton.imageView.image imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate] forState:UIControlStateNormal];
clearButton.tintColor = [UIColor defaultWhiteColor];

_navigationSearchBar.delegate = self;
[_navigationSearchBar setTranslucent:NO];
[_navigationSearchBar setBackgroundImage:nil];
[_navigationSearchBar setBarTintColor:[UIColor defaultNavigationBarColor]];
[_navigationSearchBar setBackgroundColor:[UIColor defaultNavigationBarColor]];
[_navigationSearchBar setImage:[UIImage imageNamed:@"Search_Icon"] forSearchBarIcon:UISearchBarIconSearch state:UIControlStateNormal];
_navigationSearchBar.clipsToBounds = YES;
[_navigationBar addSubview:_navigationSearchBar];

回答4:

Apple has key 'searchField' to detect textfield in searchBar. So first safely get that textfield and do the change whatever you want with textfield.

let searchController = UISearchController(searchResultsController: nil)
searchController.searchResultsUpdater = self
searchController.searchBar.placeholder = "Search here..."
searchController.searchBar.delegate = self
searchController.searchBar.tintColor = .white
searchController.searchBar.barTintColor = .white
searchController.hidesNavigationBarDuringPresentation = false
searchController.obscuresBackgroundDuringPresentation = false

if let textfield = searchController.searchBar.value(forKey: "searchField") as? UITextField {

    // Set text colour of text field   
    textfield.textColor = UIColor.blue

    if let backgroundview = textfield.subviews.first {

        // Get background view and change background color
        backgroundview.backgroundColor = UIColor.white

        // Set rounded corner
        backgroundview.layer.cornerRadius = 10
        backgroundview.clipsToBounds = true
    }
}

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

This is working code and I have implemented in my current project. Still if you have any query then let me know.

I hope this will help you.

回答5:

Max use this below function for changing color.

extension UISearchBar {
func setBackgroundColor(){
    if let view:UIView = self.subviews.first {
        for curr in view.subviews {
            guard let searchBarBackgroundClass = NSClassFromString("UISearchBarBackground") else {
                return
            }
            if curr.isKind(of:searchBarBackgroundClass){
                if let imageView = curr as? UIImageView{
                    imageView.backgroundColor = .red
                    break
                }
            }
        }
    }
}
}

Use this function with searchbar.

searchBarController.searchBar.setBackgroundColor()

回答6:

There is no any proper/public way for changing this searchbar's background color. There are some ways by using private apis, like answer by @sanjayshah, but in that case, there are chances that apple might reject your application. I think you should move on using default background color. Most of the apps use the same.

回答7:

A recursive version of @Kamran's answer with a better best-case and average running time. The accepted version does not work on iOS 13+ for me.

private lazy var searchTextField: UITextField? = { [unowned self] in
    guard let searchBar = self.searchController?.searchBar else { return nil }
    var views =  searchBar.subviews
    while !views.isEmpty {
        guard let view = views.popLast() else { break }
        if let textfield = view as? UITextField {
            return textfield
        }
        views += view.subviews
    }
    return nil
}()

回答8:

Did you try something like

searchController.searchBar.backgroundColor = UIColor.blue

回答9:

Just do the following:

searchController.searchBar.barTintColor = UIColor("Your color")

来源：https://stackoverflow.com/questions/53762568/how-to-change-background-color-of-the-text-field-in-the-uisearchcontroller