UISearchBar change placeholder color

问题

Has anyone any idea or code sample on how can I change the text color of the placeholder text of a UISearchBar?

回答1:

for iOS5+ use the appearance proxy

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

回答2:

Found the answer from Change UITextField's placeholder text color programmatically

// Get the instance of the UITextField of the search bar
UITextField *searchField = [searchBar valueForKey:@"_searchField"];

// Change search bar text color
searchField.textColor = [UIColor redColor];

// Change the search bar placeholder text color
[searchField setValue:[UIColor blueColor] forKeyPath:@"_placeholderLabel.textColor"];

回答3:

Here is a Solution for Swift:

Swift 2

var textFieldInsideSearchBar = searchBar.valueForKey("searchField") as? UITextField
textFieldInsideSearchBar?.textColor = UIColor.whiteColor()

var textFieldInsideSearchBarLabel = textFieldInsideSearchBar!.valueForKey("placeholderLabel") as? UILabel
textFieldInsideSearchBarLabel?.textColor = UIColor.whiteColor()

Swift 3

let textFieldInsideSearchBar = searchBar.value(forKey: "searchField") as? UITextField
textFieldInsideSearchBar?.textColor = UIColor.white

let textFieldInsideSearchBarLabel = textFieldInsideSearchBar!.value(forKey: "placeholderLabel") as? UILabel
textFieldInsideSearchBarLabel?.textColor = UIColor.white

回答4:

First solution is OK, but if you use multiple UISearchBar, or create a lot of instances it may fail. The one solution that always work for me is to use also appearance proxy but directly on UITextField

   NSDictionary *placeholderAttributes = @{
                                            NSForegroundColorAttributeName: [UIColor darkButtonColor],
                                            NSFontAttributeName: [UIFont fontWithName:@"HelveticaNeue" size:15],
                                            };

    NSAttributedString *attributedPlaceholder = [[NSAttributedString alloc] initWithString:self.searchBar.placeholder
                                                                                attributes:placeholderAttributes];

    [[UITextField appearanceWhenContainedInInstancesOfClasses:@[[UISearchBar class]]] setAttributedPlaceholder:attributedPlaceholder];

回答5:

if let textFieldInsideSearchBar = searchBar.value(forKey: "searchField") as ? UITextField {
    textFieldInsideSearchBar ? .textColor = UIColor.white

    if let textFieldInsideSearchBarLabel = textFieldInsideSearchBar!.value(forKey: "placeholderLabel") as ? UILabel {
        textFieldInsideSearchBarLabel ? .textColor = UIColor.white

        if let clearButton = textFieldInsideSearchBar ? .value(forKey: "clearButton") as!UIButton {

            clearButton.setImage(clearButton.imageView ? .image ? .withRenderingMode(.alwaysTemplate),
                for : .normal)
            clearButton.tintColor = UIColor.white
        }
    }

    let glassIconView = textFieldInsideSearchBar ? .leftView as ? UIImageView

    glassIconView ? .image = glassIconView ? .image ? .withRenderingMode(.alwaysTemplate)
    glassIconView ? .tintColor = UIColor.white
}

回答6:

Swift 3

UILabel.appearance(whenContainedInInstancesOf: [UISearchBar.self]).textColor = UIColor.white

回答7:

Try this and see: (I tested below code with Swift 4.1 - Xcode 9.3-beta4)

@IBOutlet weak var sbSearchBar: UISearchBar!

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

    textfield.backgroundColor = UIColor.yellow
    textfield.attributedPlaceholder = NSAttributedString(string: textfield.placeholder ?? "", attributes: [NSAttributedStringKey.foregroundColor : UIColor.red])

    textfield.textColor = UIColor.green

    if let leftView = textfield.leftView as? UIImageView {
        leftView.image = leftView.image?.withRenderingMode(.alwaysTemplate)
        leftView.tintColor = UIColor.red
    }
}

Here is result:

回答8:

Try this:

[self.searchBar setValue:[UIColor whatever] forKeyPath:@"_searchField._placeholderLabel.textColor"];

You can also set this in storyboard, select search bar, add entry under User Defined Runtime Attributes:

_searchField._placeholderLabel.textColor

of type Color and select the color you need.

回答9:

It's an old post but please check this post for an appropriate solution iPhone UITextField - Change placeholder text color

回答10:

It looks like Apple does not want us to play with the placeholder colors when it comes to UISearchBar class. So, let's create our own placeholder label!

No subclassing.
Works with iOS 13 SDK.
Just one innocent workaround.

let searchBar = searchController.searchBar
// ...
// Configure `searchBar` if needed
// ...

let searchTextField: UITextField
if #available(iOS 13, *) {
    searchTextField = searchBar.searchTextField
} else {
    searchTextField = (searchBar.value(forKey: "searchField") as? UITextField) ?? UITextField()
}

// Since iOS 13 SDK, there is no accessor to get the placeholder label.
// This is the only workaround that might cause issued during the review.
if let systemPlaceholderLabel = searchTextField.value(forKey: "placeholderLabel") as? UILabel {
    // Empty or `nil` strings cause placeholder label to be hidden by the search bar
    searchBar.placeholder = " "

    // Create our own placeholder label
    let placeholderLabel = UILabel(frame: .zero)

    placeholderLabel.text = "Search"
    placeholderLabel.font = UIFont.systemFont(ofSize: 17.0, weight: .regular)
    placeholderLabel.textColor = UIColor.blue.withAlphaComponent(0.5)

    systemPlaceholderLabel.addSubview(placeholderLabel)

    // Layout label to be a "new" placeholder
    placeholderLabel.leadingAnchor.constraint(equalTo: systemPlaceholderLabel.leadingAnchor).isActive = true
    placeholderLabel.topAnchor.constraint(equalTo: systemPlaceholderLabel.topAnchor).isActive = true
    placeholderLabel.bottomAnchor.constraint(equalTo: systemPlaceholderLabel.bottomAnchor).isActive = true
    placeholderLabel.translatesAutoresizingMaskIntoConstraints = false
    placeholderLabel.setContentCompressionResistancePriority(.defaultHigh, for: .horizontal)
} else {
    searchBar.placeholder = ""
}

回答11:

After surveyed a couple of answers, I come out this, hope its help

for (UIView *subview in searchBar.subviews) {
    for (UIView *sv in subview.subviews) {
        if ([NSStringFromClass([sv class]) isEqualToString:@"UISearchBarTextField"]) {

            if ([sv respondsToSelector:@selector(setAttributedPlaceholder:)]) {
                ((UITextField *)sv).attributedPlaceholder = [[NSAttributedString alloc] initWithString:searchBar.placeholder attributes:@{NSForegroundColorAttributeName: [UIColor whiteColor]}];
            }
            break;
        }
    }
}

回答12:

This solution works on Xcode 8.2.1. with Swift 3.0. :

extension UISearchBar
{
    func setPlaceholderTextColorTo(color: UIColor)
    {
        let textFieldInsideSearchBar = self.value(forKey: "searchField") as? UITextField
        textFieldInsideSearchBar?.textColor = color
        let textFieldInsideSearchBarLabel = textFieldInsideSearchBar!.value(forKey: "placeholderLabel") as? UILabel
        textFieldInsideSearchBarLabel?.textColor = color
    }
}

Usage example:

searchController.searchBar.setPlaceholderTextColorTo(color: mainColor)

回答13:

iOS 13

Previous solutions may not work on iOS 13 because new searchTextField has been added, and you can set attributed string on it.

I wrapped that into category:

@interface UISearchBar (AttributtedSetter)
- (void)setThemedPlaceholder:(NSString*)localizationKey;
@end

@implementation UISearchBar (AttributtedSetter)

- (void)setThemedPlaceholder:(NSString*)localizationKey {
    ThemeObject *currentTheme = [[ThemeManager standardThemeManager] currentTheme];
    self.searchTextField.attributedPlaceholder = [[NSAttributedString alloc] initWithString:NSLocalizedString(localizationKey, @"") attributes:@{NSForegroundColorAttributeName : currentTheme.colorSearchBarText}];
}

@end

回答14:

This is an old question, but for anyone stumbling on it nowadays, you can change the search icon on iOS 8.x - 10.3 using the following:

[_searchBar setImage:[UIImage imageNamed:@"your-image-name"] forSearchBarIcon:UISearchBarIconSearch state:UIControlStateNormal];

Regarding the placeholder text color, you may check my other answer, which uses a Category, here: UISearchBar change placeholder color

回答15:

Try this:

  UITextField *searchField = [searchbar valueForKey:@"_searchField"];
  field.textColor = [UIColor redColor]; //You can put any color here.

来源：https://stackoverflow.com/questions/11827585/uisearchbar-change-placeholder-color

标签

ios

uisearchbar

placeholder