NSButton如何为文本着色

Question

在OSX上我有一个非常暗的图像的NSButton,不幸的是,使用属性检查器无法更改颜色.看图片大黑色按钮,文字是Go.

是否有可能改变文字颜色的线索？我查看了NSButton类,但没有方法可以做到这一点.我知道我可以使用白色字体制作图像,但这不是我想要做的.

来自瑞士的问候,罗纳德霍夫曼--- 

Answer 1

这是另外两个解决方案:http: //denis-druz.okis.ru/news.534557.Text-Color-in-NSButton.html

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];
}

Answer 2

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

这是一个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)
    }
}

Answer 3

Apple有代码用于设置NSButton的文本颜色作为Popover示例的一部分.

以下是该示例的关键(此帖子略有修改,未经测试):

NSButton *button = ...;
NSMutableAttributedString *attrTitle =
    [[NSMutableAttributedString alloc] initWithString:@"Make Me Red"];
NSUInteger len = [attrTitle length];
NSRange range = NSMakeRange(0, len);
[attrTitle addAttribute:NSForegroundColorAttributeName value:[NSColor redColor] range:range];
[attrTitle fixAttributesInRange:range];
[button setAttributedTitle:attrTitle];

请注意,调用fixAttributesInRange:似乎很重要(AppKit扩展),但我找不到文档为何会出现这种情况.我在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.要记住一些事情.

否则,最好的办法似乎是制作你自己的drawRect:覆盖,这有许多其他缺陷超出了这个问题的范围.

Answer 4

我创建了一个NSButton名为 的子类FlatButton，它使得在 Interface Builder 的属性检查器中更改文本颜色变得非常容易，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： https: //github.com/OskarGroth/FlatButton

Answer 5

这就是我在Swift 4中完成它的方法

 @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