How to change UISearchBar Placeholder and image tint color?(如何更改 UISearchBar 占位符和图像色调颜色?)

本文介绍了如何更改 UISearchBar 占位符和图像色调颜色?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我已经尝试了几个小时的搜索结果，但我无法弄清楚这一点.也许这是不可能的.我正在尝试更改 UISearchBar 的占位符文本和放大镜的色调.如果这很重要，我只针对 iOS 8.0+.这是我的代码以及它现在的样子:

I've been trying search results for hours, but I can't get this figured out. Perhaps it isn't possible. I'm trying to change the tint color of the placeholder text and magnifying glass of a UISearchBar. I'm only targeting iOS 8.0+ if that matters. Here's my code and what it looks like now:

let searchBar = UISearchBar()
searchBar.placeholder = "Search"
searchBar.searchBarStyle = UISearchBarStyle.Minimal
searchBar.tintColor = UIColor.whiteColor()

我希望搜索和放大镜是白色的，或者可能是深绿色.

I'd like for the search and magnifying glass to be white, or perhaps a dark green.

推荐答案

如果您有可以使用的自定义图像，您可以使用类似于以下内容的方式设置图像并更改占位符文本颜色:

If you have a custom image you could use, you can set the image and change the placeholder text color using something similar to the following:

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

UITextField *searchTextField = [searchBar valueForKey:@"_searchField"];    
if ([searchTextField respondsToSelector:@selector(setAttributedPlaceholder:)]) {
    UIColor *color = [UIColor purpleColor];
    [searchTextField setAttributedPlaceholder:[[NSAttributedString alloc] initWithString:@"Search" attributes:@{NSForegroundColorAttributeName: color}]];
}

在该示例中，我使用了紫色颜色，而您可以使用 + (UIColor *)colorWithRed:(CGFloat)red green:(CGFloat)green blue:(CGFloat)blue alpha:(CGFloat)alpha 创建自定义深绿色的方法.

In that example I used purpleColor, instead you can use the + (UIColor *)colorWithRed:(CGFloat)red green:(CGFloat)green blue:(CGFloat)blue alpha:(CGFloat)alpha method to create your custom dark green color.

我刚刚意识到你正在用swift写它......呃.快速输入这个，所以我没有在 Obj-C 中留下答案.

I just realized you were writing it in swift... duh. Quickly typed this out so I didn't leave the answer in just Obj-C.

    searchBar.setImage(UIImage(named: "SearchWhite"), forSearchBarIcon: UISearchBarIcon.Search, state: UIControlState.Normal);

    var searchTextField: UITextField? = searchBar.valueForKey("searchField") as? UITextField
    if searchTextField!.respondsToSelector(Selector("attributedPlaceholder")) {
        var color = UIColor.purpleColor()
        let attributeDict = [NSForegroundColorAttributeName: UIColor.purpleColor()]
        searchTextField!.attributedPlaceholder = NSAttributedString(string: "search", attributes: attributeDict)
    }

Swift 3.0

    var searchTextField: UITextField? = searchBar.value(forKey: "searchField") as? UITextField
    if searchTextField!.responds(to: #selector(getter: UITextField.attributedPlaceholder)) {
        let attributeDict = [NSForegroundColorAttributeName: UIColor.white]
        searchTextField!.attributedPlaceholder = NSAttributedString(string: "Search", attributes: attributeDict)
    }

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