如何更改UISegmentedControl的字体颜色

Question

我尝试将字体颜色从白色更改为黑色UISegmentedControl(适用于iOS 4.*)

UISegmentedControl *button = [[[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObjects:itemTitle, nil]] autorelease];
button.momentary = YES;
button.segmentedControlStyle = UISegmentedControlStyleBar;
button.tintColor = [UIColor redColor];      
for (id segment in [button subviews]) {
    for (id label in [segment subviews]) {
        if ([label isKindOfClass:[UILabel class]]) {
            UILabel *titleLabel = (UILabel *) label;
            [titleLabel setTextColor:[UIColor blackColor]];
        }
    }
}
UIBarButtonItem *barButtonItem = [[[UIBarButtonItem alloc] initWithCustomView:button] autorelease];

但文字颜色没有改变.我应该做些什么来改变文字颜色UISegmentedControl？

Answer 1

在iOS 6.0及更高版本中,它非常简单:

NSDictionary *attributes = [NSDictionary dictionaryWithObjectsAndKeys:
                            [UIFont boldSystemFontOfSize:17], NSFontAttributeName,
                            [UIColor blackColor], NSForegroundColorAttributeName,
                            nil];
[_segmentedControl setTitleTextAttributes:attributes forState:UIControlStateNormal];
NSDictionary *highlightedAttributes = [NSDictionary dictionaryWithObject:[UIColor whiteColor] forKey:NSForegroundColorAttributeName];
[_segmentedControl setTitleTextAttributes:highlightedAttributes forState:UIControlStateSelected];

Answer 2

如果您需要更改iOS 7中突出显示的片段的文本颜色,这里有一个解决方案(花了我一段时间才能找到,但感谢这篇文章):

Objective-C的

[[UISegmentedControl appearance] setTitleTextAttributes:@{NSForegroundColorAttributeName : [UIColor blackColor]} forState:UIControlStateSelected];

迅速

  let titleTextAttributes = [NSForegroundColorAttributeName: UIColor.whiteColor()]  
  UISegmentedControl.appearance().setTitleTextAttributes(titleTextAttributes, forState: .Selected)

Answer 3

下面是将字体设置为粗体和点大小的代码:

UIFont *Boldfont = [UIFont boldSystemFontOfSize:12.0f];
NSDictionary *attributes = [NSDictionary dictionaryWithObject:Boldfont
                                                       forKey: NSFontAttributeName];
[segmentedControl setTitleTextAttributes:attributes 
                                forState:UIControlStateNormal];

我希望它有所帮助

Answer 4

Swift 4代码将状态字体颜色设置为黑色

    let titleTextAttributes = [NSAttributedString.Key.foregroundColor: UIColor.black]
    segmentedControl.setTitleTextAttributes(titleTextAttributes, for: .normal)
    segmentedControl.setTitleTextAttributes(titleTextAttributes, for: .selected)

Answer 5

for (UIView *v in [[[segment subviews] objectAtIndex:0] subviews]) {
    if ([v isKindOfClass:[UILabel class]]) {
        UILabel *label=(UILabel *)[v retain];
        lable.textColor=[UIColor blackColor];
    }
}

适用于iOS 3.0及更高版本

Answer 6

已针对Swift 4更新-使用此扩展程序（因为扩展程序总是很棒.. !!）

extension UISegmentedControl {

func defaultConfiguration(font: UIFont = UIFont.systemFont(ofSize: 12), color: UIColor = UIColor.gray) {
    let defaultAttributes = [
        NSAttributedStringKey.font.rawValue: font,
        NSAttributedStringKey.foregroundColor.rawValue: color
    ]
    setTitleTextAttributes(defaultAttributes, for: .normal)
}

func selectedConfiguration(font: UIFont = UIFont.boldSystemFont(ofSize: 12), color: UIColor = UIColor.red) {
    let selectedAttributes = [
        NSAttributedStringKey.font.rawValue: font,
        NSAttributedStringKey.foregroundColor.rawValue: color
    ]
    setTitleTextAttributes(selectedAttributes, for: .selected)
}
}

您可以在相应的类中使用这些功能，

@IBOutlet weak var segment: UISegmentedControl!

segment.defaultConfiguration()
// or provide paramater as per your requirement
segment.selectedConfiguration(color: .blue)

Answer 7

以防万一帮助其他人到达那里并且正在使用 swift 工作。

我将提出两种可能的方法。您可以UIAppearance在正在工作的分段中或直接在分段中更改文本属性。

第一个示例在外观中设置属性，这样您将自定义应用程序中的所有分段控件：

    let attributes = [ NSForegroundColorAttributeName : UIColor.grayColor(),
        NSFontAttributeName : UIFont.systemFontOfSize(20)];
    let attributesSelected = [ NSForegroundColorAttributeName : UIColor.blueColor(),
        NSFontAttributeName : UIFont.systemFontOfSize(20)];
    UISegmentedControl.appearance().setTitleTextAttributes(attributes, forState: UIControlState.Normal)
    UISegmentedControl.appearance().setTitleTextAttributes(attributesSelected, forState: UIControlState.Selected)

第二个例子，直接在segmented中，只会自定义这个segmented：

    let attributes = [ NSForegroundColorAttributeName : UIColor.grayColor(),
        NSFontAttributeName : UIFont.systemFontOfSize(20)];
    let attributesSelected = [ NSForegroundColorAttributeName : UIColor.blueColor(),
        NSFontAttributeName : UIFont.systemFontOfSize(20)];
    segmented.setTitleTextAttributes(attributes, forState: UIControlState.Normal)
    segmented.setTitleTextAttributes(attributesSelected, forState: UIControlState.Selected)

Answer 8

在 Swift 5 中，您可以使用此语法更改颜色

斯威夫特 5

let titleTextAttributes = [NSAttributedString.Key.foregroundColor: UIColor.red]
groupSegment.setTitleTextAttributes(titleTextAttributes, for: .selected)

Answer 9

Swift 5扩展

extension UISegmentedControl {

    func setTitleColor(_ color: UIColor, state: UIControl.State = .normal) {
        var attributes = self.titleTextAttributes(for: state) ?? [:]
        attributes[.foregroundColor] = color
        self.setTitleTextAttributes(attributes, for: state)
    }
    
    func setTitleFont(_ font: UIFont, state: UIControl.State = .normal) {
        var attributes = self.titleTextAttributes(for: state) ?? [:]
        attributes[.font] = font
        self.setTitleTextAttributes(attributes, for: state)
    }

}