Objective c NSButton如何为文本着色

在OSX上，我有一个NSButton，图像非常暗，不幸的是，无法使用属性检查器更改颜色。请参见图片中的黑色大按钮，文本为Go

有没有可能改变文本颜色的线索？我查看了NSButton类，但是没有方法可以做到这一点。我知道我可以用白色字体制作图像，但这不是我想做的

来自瑞士的问候，罗纳德·霍夫曼

---

---这里还有另外两种解决方案：

解决方案1：

-(void)awakeFromNib
{
    NSColor *color = [NSColor greenColor];
    NSMutableAttributedString *colorTitle = [[NSMutableAttributedString alloc] initWithAttributedString:[button attributedTitle]];
    NSRange titleRange = NSMakeRange(0, [colorTitle length]);
    [colorTitle addAttribute:NSForegroundColorAttributeName value:color range:titleRange];
    [button setAttributedTitle:colorTitle];
}

解决方案2：

在*.m文件中：

- (void)setButtonTitleFor:(NSButton*)button toString:(NSString*)title withColor:(NSColor*)color
{
    NSMutableParagraphStyle *style = [[NSMutableParagraphStyle alloc] init];
    [style setAlignment:NSCenterTextAlignment];
    NSDictionary *attrsDictionary = [NSDictionary dictionaryWithObjectsAndKeys:color, NSForegroundColorAttributeName, style, NSParagraphStyleAttributeName, nil];
    NSAttributedString *attrString = [[NSAttributedString alloc]initWithString:title attributes:attrsDictionary];
    [button setAttributedTitle:attrString];
}

-(void)awakeFromNib
{
    NSString *title = @"+Add page";
    NSColor *color = [NSColor greenColor];
    [self setButtonTitleFor:button toString:title withColor:color];
}

---

苹果公司拥有设置NSButton文本颜色的代码，该代码是应用程序的一部分

下面是该示例的关键（本篇文章稍作修改，未经测试）：

请注意，对

fixAttributesInRange:

的调用似乎很重要（AppKit扩展），但我找不到关于为什么会这样的文档。在NSButton中使用属性字符串的唯一问题是，如果还为按钮定义了图像（例如图标），则属性字符串将占据一个大矩形，并将图像推到按钮的边缘。要记住的事情

否则，最好的方法似乎是让您自己的

drawRect:

替代，这有许多其他陷阱，超出了这个问题的范围。

我的解决方案：

.h

IB_DESIGNABLE
@interface DVButton : NSButton

@property (nonatomic, strong) IBInspectable NSColor *BGColor;
@property (nonatomic, strong) IBInspectable NSColor *TextColor;

@end


.m

@implementation DVButton

- (void)awakeFromNib
{
    if (self.TextColor)
    {
        NSMutableParagraphStyle *style = [[NSMutableParagraphStyle alloc] init];
        [style setAlignment:NSCenterTextAlignment];
        NSDictionary *attrsDictionary  = [NSDictionary dictionaryWithObjectsAndKeys:
                                          self.TextColor, NSForegroundColorAttributeName,
                                          self.font, NSFontAttributeName,
                                          style, NSParagraphStyleAttributeName, nil];
        NSAttributedString *attrString = [[NSAttributedString alloc]initWithString:self.title attributes:attrsDictionary];
        [self setAttributedTitle:attrString];
    }
}


- (void)drawRect:(NSRect)dirtyRect
{
    if (self.BGColor)
    {
        // add a background colour
        [self.BGColor setFill];
        NSRectFill(dirtyRect);
    }

    [super drawRect:dirtyRect];
}

@end

以下是Swift 3版本：

import Cocoa

@IBDesignable
class DVButton: NSButton
{
    @IBInspectable var bgColor: NSColor?
    @IBInspectable var textColor: NSColor?

    override func awakeFromNib()
    {
        if let textColor = textColor, let font = font
        {
            let style = NSMutableParagraphStyle()
            style.alignment = .center

            let attributes =
            [
                NSForegroundColorAttributeName: textColor,
                NSFontAttributeName: font,
                NSParagraphStyleAttributeName: style
            ] as [String : Any]

            let attributedTitle = NSAttributedString(string: title, attributes: attributes)
            self.attributedTitle = attributedTitle
        }
    }

    override func draw(_ dirtyRect: NSRect)
    {
        if let bgColor = bgColor
        {
            bgColor.setFill()
            NSRectFill(dirtyRect)
        }

        super.draw(dirtyRect)
    }

}

和Swift 4.0版本：

import Cocoa

@IBDesignable
 class Button: NSButton
{
    @IBInspectable var bgColor: NSColor?
    @IBInspectable var textColor: NSColor?

    override func awakeFromNib()
    {
        if let textColor = textColor, let font = font
        {
            let style = NSMutableParagraphStyle()
            style.alignment = .center

            let attributes =
            [
                NSAttributedStringKey.foregroundColor: textColor,
                NSAttributedStringKey.font: font,
                NSAttributedStringKey.paragraphStyle: style
             ] as [NSAttributedStringKey : Any]

            let attributedTitle = NSAttributedString(string: title, attributes: attributes)
            self.attributedTitle = attributedTitle
        }
    }

    override func draw(_ dirtyRect: NSRect)
    {
        if let bgColor = bgColor
        {
            bgColor.setFill()
            __NSRectFill(dirtyRect)
        }

        super.draw(dirtyRect)
    }
}

---

在NSButton上添加一个类别，只需将颜色设置为所需的颜色，并保存现有属性，因为标题可以居中、左对齐等

---

一个真正简单、可重用的解决方案，无需子类化NSButton：

[self setButton:self.myButton fontColor:[NSColor whiteColor]] ;

-(void) setButton:(NSButton *)button fontColor:(NSColor *)color {
    NSMutableAttributedString *colorTitle = [[NSMutableAttributedString alloc] initWithAttributedString:[button attributedTitle]];
    [colorTitle addAttribute:NSForegroundColorAttributeName value:color range:NSMakeRange(0, button.attributedTitle.length)];
    [button setAttributedTitle:colorTitle];
}

---

我已经创建了一个名为

FlatButton

的

NSButton

子类，它可以非常轻松地更改Interface Builder属性检查器中的文本颜色，就像您所要求的那样。它应该为您的问题提供简单而广泛的解决方案

它还公开其他相关的样式属性，例如颜色和形状

您可以在这里找到它：

---

这就是我在Swift 4中完成的方法

 @IBOutlet weak var myButton: NSButton!

 // create the attributed string
 let myString = "My Button Title"
 let myAttribute = [ NSAttributedStringKey.foregroundColor: NSColor.blue ]
 let myAttrString = NSAttributedString(string: myString, attributes: myAttribute)
 // assign it to the button
 myButton.attributedTitle = myAttrString

---

使用上面的信息，我编写了一个NSButton扩展，用于设置前景颜色，以及系统字体和文本对齐方式

这适用于Swift 4.x上的Cocoa，但可以轻松地针对iOS进行调整

import Cocoa

extension NSButton {
    func setAttributes(foreground: NSColor? = nil, fontSize: CGFloat = -1.0, alignment: NSTextAlignment? = nil) {

        var attributes: [NSAttributedStringKey: Any] = [:]

        if let foreground = foreground {
            attributes[NSAttributedStringKey.foregroundColor] = foreground
        }

        if fontSize != -1 {
            attributes[NSAttributedStringKey.font] = NSFont.systemFont(ofSize: fontSize)
        }

        if let alignment = alignment {
            let paragraph = NSMutableParagraphStyle()
            paragraph.alignment = alignment
            attributes[NSAttributedStringKey.paragraphStyle] = paragraph
        }

        let attributed = NSAttributedString(string: self.title, attributes: attributes)
        self.attributedTitle = attributed
    }
}

---

当您的目标是macOS 10.14或更新版本时，您可以使用NSButton控件的new

contentTintColor

属性来设置文本颜色

button.contentTintColor = NSColor.systemGreenColor;

---

David Boyd解决方案的Swift 4.2版本

extension NSButton {
func setAttributes(foreground: NSColor? = nil, fontSize: CGFloat = -1.0, alignment: NSTextAlignment? = nil) {

    var attributes: [NSAttributedString.Key: Any] = [:]

    if let foreground = foreground {
        attributes[NSAttributedString.Key.foregroundColor] = foreground
    }

    if fontSize != -1 {
        attributes[NSAttributedString.Key.font] = NSFont.systemFont(ofSize: fontSize)
    }

    if let alignment = alignment {
        let paragraph = NSMutableParagraphStyle()
        paragraph.alignment = alignment
        attributes[NSAttributedString.Key.paragraphStyle] = paragraph
    }

    let attributed = NSAttributedString(string: self.title, attributes: attributes)
    self.attributedTitle = attributed
}

---

}Swift 5

您可以使用此扩展：

extension NSButton {

@IBInspectable var titleColor: NSColor? {
    get {
        return   NSColor.white
    }
    set {
        let pstyle = NSMutableParagraphStyle()
        pstyle.alignment = .center
        
        self.attributedTitle = NSAttributedString(
            string: self.title,
            attributes: [ NSAttributedString.Key.foregroundColor :newValue, NSAttributedString.Key.paragraphStyle: pstyle])
        
    }
   }
 }

---

现在，您可以轻松设置故事板中的标题颜色。干杯

如果部署目标>10.14，可以使用

contentTintColor

设置颜色

/** Applies a tint color to template image and text content, in combination with other theme-appropriate effects. Only applicable to borderless buttons. A nil value indicates the standard set of effects without color modification. The default value is nil. Non-template images and attributed string values are not affected by the contentTintColor. */
@available(macOS 10.14, *)
@NSCopying open var contentTintColor: NSColor?

示例代码：

var confirmBtn = NSButton()
confirmBtn.title = "color"
confirmBtn.contentTintColor = NSColor.red

---

不，还没有，等一下：）同样的事情NSAttributedString中没有setColor。

-[NSMutableAttributedString addAttribute:NSForegroundColorAttributeName值：[NSColorWithRGred:1.0绿色：0.0蓝色：0.0 alpha:0.0]范围：NSMakeRange（0，string.length）]非常好的H2CO3，感谢您的努力。Go现在是白色的。但现在围棋在左边的按钮外面是白色的，很小。很遗憾，无法在此处粘贴图像；（我选择了Position，但没有成功。我不明白为什么字体大小和位置会发生变化？对吗？我假设会和以前一样。我只是想改变字体颜色。这并不是你遇到的问题的答案，但为什么不在你初始化按钮的图像中添加任何你想要的文本呢？）st输入…是的，这绝对是一个解决方案。另一方面，我很好奇，想知道事情是如何运作的。请编辑你的答案并格式化代码，使其可读。请正确格式化。这样，其他用户更容易阅读你的帖子。点击按钮文本被删除，osx 10.11，xcode 8.1你能添加一些文本来解释吗您的解决方案？这是Xamarin.Mac的答案。它对我很有帮助。我建议将属性字符串基于button.AttributedTitle而不是button.Cell.Title，这样可以保留标题所具有的任何其他（隐式）属性。您认为可以为此解决方案添加圆角吗？：@Yatko只需替换NSRectFill（dirtyRect）使用：let rect=NSMakeRect（0，0，bounds.width，bounds.height）let rectanglePath=NSBezierPath（roundedRect:rect，xRadius:3，yRadius:3）rectanglePath.fill（）
contentTintColor
extension NSButton {

@IBInspectable var titleColor: NSColor? {
    get {
        return   NSColor.white
    }
    set {
        let pstyle = NSMutableParagraphStyle()
        pstyle.alignment = .center
        
        self.attributedTitle = NSAttributedString(
            string: self.title,
            attributes: [ NSAttributedString.Key.foregroundColor :newValue, NSAttributedString.Key.paragraphStyle: pstyle])
        
    }
   }
 }

/** Applies a tint color to template image and text content, in combination with other theme-appropriate effects. Only applicable to borderless buttons. A nil value indicates the standard set of effects without color modification. The default value is nil. Non-template images and attributed string values are not affected by the contentTintColor. */
@available(macOS 10.14, *)
@NSCopying open var contentTintColor: NSColor?

var confirmBtn = NSButton()
confirmBtn.title = "color"
confirmBtn.contentTintColor = NSColor.red