Changing the Color of the Icons in a Uitextfield Inside a Uisearchbar

Changing the color of the icons in a UItextField inside a UISearchBar

Here is the solution:

// Text field in search bar.
let textField = searchController.searchBar.value(forKey: "searchField") as! UITextField

let glassIconView = textField.leftView as! UIImageView
glassIconView.image = glassIconView.image?.withRenderingMode(.alwaysTemplate)
glassIconView.tintColor = UIColor.white

let clearButton = textField.valueForKey("clearButton") as! UIButton
clearButton.setImage(clearButton.imageView?.image?.withRenderingMode(.alwaysTemplate), for: .normal)
clearButton.tintColor = UIColor.white

How to change the color of the UISearchBar Icon?

You can use a custom image of a white search icon, as the search bar will not modify your supplied image. To set a custom image, use this method. (Link to documentation.)

- (void)setImage:(UIImage *)iconImage
forSearchBarIcon:(UISearchBarIcon)icon
           state:(UIControlState)state;

Example Code:

[searchBar setImage:[UIImage imageNamed:@"SearchIcon"]
   forSearchBarIcon:UISearchBarIconSearch
              state:UIControlStateNormal];

In Swift:

searchBar.setImage(UIImage(named: "SearchIcon"), for: .search, state: .normal)

How to change inside background color of UISearchBar component on iOS

Use this code to change the searchBar's UITextField backgroundImage:

UITextField *searchField;
NSUInteger numViews = [searchBar.subviews count];
for (int i = 0; i < numViews; i++) {
    if ([[searchBar.subviews objectAtIndex:i] isKindOfClass:[UITextField class]]) { //conform?
        searchField = [searchBar.subviews objectAtIndex:i];
    }
}
if (searchField) {
    searchField.textColor = [UIColor whiteColor];
    [searchField setBackground: [UIImage imageNamed:@"yourImage"]]; //set your gray background image here
    [searchField setBorderStyle:UITextBorderStyleNone];
}

Use the below code to change the UISearchBarIcon:

 UIImageView *searchIcon = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"yourSearchBarIconImage"]];
searchIcon.frame = CGRectMake(10, 10, 24, 24);
[searchBar addSubview:searchIcon];
[searchIcon release];

Also, to change the searchBar icon you can use the following built-in method on UISearchBar (which is available from iOS 5+):

- (void)setImage:(UIImage *)iconImage forSearchBarIcon:(UISearchBarIcon)icon state:(UIControlState)state

Here you can set 4 types of UISearchBarIcon i.e.:

1. UISearchBarIconBookmark
2. UISearchBarIconClear
3. UISearchBarIconResultsList
4. UISearchBarIconSearch

I hope this help you...

UISearchBar text color change in iOS 7

In iOS 7 to access Text Field you have to reiterate on level more. Change your code like this

for (UIView *subView in self.searchBar.subviews)
{
    for (UIView *secondLevelSubview in subView.subviews){
        if ([secondLevelSubview isKindOfClass:[UITextField class]])
        {
            UITextField *searchBarTextField = (UITextField *)secondLevelSubview;

            //set font color here
            searchBarTextField.textColor = [UIColor blackColor];

            break;
        }
    }
}

Note : This is Not Public API

OR

You can use appearance Property of UIControls, Like

[[UITextField appearanceWhenContainedIn:[UISearchBar class], nil] setDefaultTextAttributes:@{NSForegroundColorAttributeName:[UIColor redColor]}];

Note: Appearance proxy can be used for iOS 9.0+
OutPut

You can set The tintcolor to apply to key elements in the search bar.

Use tintColor to tint foreground elements.

Use barTintColor to tint the bar background.

In iOS v7.0, all subclasses of UIView derive their behavior for tintColor from the base class. See the discussion of tintColor at the UIView level for more information.
Apple Doc

UISearchBar change placeholder color

for iOS5+ use the appearance proxy

[[UILabel appearanceWhenContainedIn:[UISearchBar class], nil] setTextColor:[UIColor redColor]];

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

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

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