NSButton how to color the text

问题:

on OSX I have an NSButton with a pretty dark image and unfortunately it is not possible to change the color using the attributes inspector. See picture the big black button, the text is Go.

Any clues for a possibility to change the text color? I looked in to the NSButton class but there is no method to do that. I´m aware that I could make the image with white font but that is not what I want to do.

Greetings from Switzerland, Ronald Hofmann --- 

回答1:

Here is two other solutions: http://denis-druz.okis.ru/news.534557.Text-Color-in-NSButton.html

solution 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];
}

solution 2:

in *.m file:

- (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];
}

回答2:

My solution:

.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

And here’s a Swift 3 version:

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)
    }

}

and Swift 4.0 version:

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)
    }
}

回答3:

Apple have code for setting the text colour of an NSButton as part of the Popover example.

Below is the crux of the example (modified slightly for this post, untested):

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];

Note that the call to fixAttributesInRange: seems to be important (an AppKit extension), but I can't find documentation as to why that is the case. The only concern I have with using attributed strings in an NSButton is if an image is also defined for the button (such as an icon), the attributed string will occupy a large rectangle and push the image to the edge of the button. Something to bear in mind.

Otherwise it seems the best way is to make your own drawRect: override instead, which has many other pitfalls that are outside the scope of this question.

回答4:

This is how I get it done in Swift 4

 @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

回答5:

I've created a NSButton subclass called FlatButton that makes it super-easy to change the text color in the Attributes Inspector of Interface Builder like you are asking for. It should provide a simple and extensive solution to your problem.

It also exposes other relevant styling attributes such as color and shape.

You'll find it here: https://github.com/OskarGroth/FlatButton

回答6:

Add a category on the NSButton and simply set the color to what you want, and preseve the existing attributes, since the title can be centered, left aligned etc

@implementation NSButton (NSButton_IDDAppKit)

- (NSColor*)titleTextColor {

    return [NSColor redColor];

}

- (void)setTitleTextColor:(NSColor*)aColor {

    NSMutableAttributedString*  attributedString = [[NSMutableAttributedString alloc] initWithAttributedString:self.attributedTitle];
    NSString*  title = self.title;
    NSRange  range = NSMakeRange(0.0, self.title.length);

    [attributedString addAttribute:NSForegroundColorAttributeName value:aColor range:range];
    [self setAttributedTitle:attributedString];
    [attributedString release];

}

@end

回答7:

A really simple, reusable solution without subclassing 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];
}

回答8:

NSColor color = NSColor.White;  
NSMutableAttributedString colorTitle = new NSMutableAttributedString (cb.Cell.Title);                
NSRange titleRange = new NSRange (0, (nint)cb.Cell.Title.Length);
colorTitle.AddAttribute (NSStringAttributeKey.ForegroundColor, color, titleRange);      
cb.Cell.AttributedTitle = colorTitle;  

回答9:

Using the info above, I wrote a NSButton extension that sets the foreground color, along with the system font and text alignment.

This is for Cocoa on Swift 4.x, but could be easily adjusted for iOS.

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
    }
}

回答10:

When your target is macOS 10.14 or newer, you can use the new tintColor property of the NSButton control to set the text color.