UISearchBar中范围按钮文本的颜色

Question

我有一个UISearchBar,它必须有灰色调.

我现在遇到的问题是,一旦我设置了任何色调颜色,范围按钮就会得到相同的字体颜色,如果没有选择按钮,会导致对比度非常差.

如果未设置色调,则颜色会根据所选状态而有所不同.有没有办法实现这一点,使用淡色？

默认

使用色调

更新

使用po [mySearchBar recursiveDescription]我发现它UISearchbar具有以下视图层次结构:

<UISegmentedControl>
    <_UISegmentedControlBackgroundView>
        <UIImageView>
    <UISegment>
        <UISegmentLabel>
        <UIImageView>
    <UISegment>
        <UISegmentLabel>
        <UIImageView>
    <UISegment>
        <UISegmentLabel>
        <UIImageView>
<UISearchBarBackground>

Answer 1

我似乎记得在使用色调时会遇到类似的问题.看起来不幸的副作用是它默认与其影响的UIKit元素的颜色相关属性.

我不知道在使用色调时是否有办法防止此缺陷(我认为没有),但以下解决方法可能对您有用:

iOS 6及以下版本

[searchBar setScopeBarButtonTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor redColor], UITextAttributeTextColor, nil] forState:UIControlStateNormal];
[searchBar setScopeBarButtonTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor greenColor], UITextAttributeTextColor, nil] forState:UIControlStateSelected];

iOS 7+

[searchBar setScopeBarButtonTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor redColor], NSForegroundColorAttributeName, nil] forState:UIControlStateNormal];
[searchBar setScopeBarButtonTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor greenColor], NSForegroundColorAttributeName, nil] forState:UIControlStateSelected];

(信用:@willyang)

使用UISearchBar的setScopeBarButtonTitleTextAttributes:forState:方法,你可以配置范围栏按钮标题的属性,包括文本颜色.

Answer 2

由于UITextAttributeTextColor在IOS 7过时,应该用NSForegroundColorAttributeName改为:

[searchBar setScopeBarButtonTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor redColor], NSForegroundColorAttributeName, nil] forState:UIControlStateNormal];
[searchBar setScopeBarButtonTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor greenColor], NSForegroundColorAttributeName, nil] forState:UIControlStateSelected];

参考:http://www.downstairz.net/2013/11/24/uitextattributetextcolor-is-deprecated-in-ios-7/