ios UISearchBar 更改占位符颜色

UISearchBar change placeholder color

提问by csotiriou

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

有没有人对如何更改 UISearchBar 占位符文本的文本颜色有任何想法或代码示例？

回答by Zayin Krige

for iOS5+use the appearance proxy

对于iOS5+使用外观代理

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

回答by Wayne Liu

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

以编程方式从Change UITextField's placeholder text color 中找到答案

// 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by Marcin Ma?ysz

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

第一个解决方案是可以的，但是如果您使用多个 UISearchBar，或者创建大量实例，它可能会失败。始终对我有用的一种解决方案是也使用外观代理，但直接在 UITextField 上使用

   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by derdida

Here is a Solution for Swift:

这是 Swift 的解决方案：

Swift 2

斯威夫特 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

斯威夫特 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by phitsch

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by Krunal

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

试试这个看看：（我用 Swift 4.1 - Xcode 9.3-beta4测试了下面的代码）

@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:

这是结果：

回答by Shoaib

Swift 3

斯威夫特 3

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

回答by Borzh

Try this:

尝试这个：

[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:

您也可以在故事板中设置它，选择搜索栏，在用户定义的运行时属性下添加条目：

_searchField._placeholderLabel.textColor

of type Colorand select the color you need.

类型的颜色，然后选择您需要的颜色。

回答by Ayoub Khayati

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

这是一篇旧帖子，但请查看此帖子以获取适当的解决方案 iPhone UITextField - 更改占位符文本颜色

回答by Martin Berger

iOS 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.

以前的解决方案可能不适用于 iOS 13，因为已添加新的 searchTextField，您可以在其上设置属性字符串。

I wrapped that into category:

我把它归为一类：

@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