Attributed String Foreground color not working in Swift

Question

I am using the following code to change the foreground color and font of a attribute string using Swift. But the Font changing perfectly without any problem but the foreground color is not changing

var checklistText = NSMutableAttributedString()
        checklistText = NSMutableAttributedString(string: "\(lblChecklistName.text!),\(checklistName)")
        checklistText.addAttribute(NSFontAttributeName,
                                   value: UIFont(
                                    name: "Helvetica",
                                    size: 11.0)!,
                                   range: NSRange(location: lblChecklistName.text!.length(), length: checklistName.length()))
        checklistText.addAttribute(NSForegroundColorAttributeName, value: UIColor.redColor(), range: NSRange(location: lblChecklistName.text!.length(), length: checklistName.length()+1))
        lblChecklistName.attributedText = checklistText

Answer 1

I have meet the same issue. Although I'm not using ranges to construct a AttributedString My code looked like

self.contentTextLabel.attributedText = NSAttributedString(string: "content",
                                                            attributes: [.foregroundColor: UIColor.red, .background: UIColor.blue])

When running, the background color shows blue, but the foreground color does not appear red. I thought it a swift's issue, so I also tried it in Objective-C, but still does not work.

I'm using storyboard and I resolved this by remove the named color set on that label. I think it's Apple's bug, somehow named color set on label have override foreground color set in attributed string.

Answer 2

Set strokeWidth to negative and strokeColor as desired color. This worked for me. It works with namedColor.

let gdprString = "test test test"

let gdprAttributes = [
    NSAttributedString.Key.underlineStyle: 
    NSUnderlineStyle.single.rawValue,
    NSAttributedString.Key.font: UIFont.systemFont(ofSize: 15.0),
    NSAttributedString.Key.link: gdprString,
    NSAttributedString.Key.strokeWidth: -3.0,      
    NSAttributedString.Key.strokeColor: UIColor.blue 
] as [NSAttributedString.Key : Any]