Changing Specific Text's Color Using Nsmutableattributedstring in Swift

Change string color with NSAttributedString?

There is no need for using NSAttributedString. All you need is a simple label with the proper textColor. Plus this simple solution will work with all versions of iOS, not just iOS 6.

But if you needlessly wish to use NSAttributedString, you can do something like this:

UIColor *color = [UIColor redColor]; // select needed color
NSString *string = ... // the string to colorize
NSDictionary *attrs = @{ NSForegroundColorAttributeName : color };
NSAttributedString *attrStr = [[NSAttributedString alloc] initWithString:string attributes:attrs];
self.scanLabel.attributedText = attrStr;

How to set NSAttributedString text color?

Your problem is on the strokeWidth property, because you are using a positive number only the stroke is affected. You need to use a negative number to change stroke and fill the text, as stated on the documentation of the strokeWidth property:

Specify positive values to change the stroke width alone. Specify negative values to stroke and fill the text.

let strokeTextAttributes: [NSAttributedString.Key : Any] = [
    .strokeColor : UIColor.white,
    .foregroundColor : UIColor.red,
    .font : UIFont.init(name: "Raleway-ExtraBold", size: 26)!,
    .strokeWidth : -0.5,
]

In my opinion, it's also better to specify the data type of the list instead of casting a list to that type specific type.

Swift -How to change the color of a UIButton's NSMutableAttributedString after it has been set

You should insert UIView.animate function inside of DispatchQueue.main.async {} to make a smooth transition. Making any kind of animation of the UI asynchronously on the main thread is always recommended.

Swift title change color of attributed string remains default blue color

Use this for the NSMutableAttributedString attributes parameter:

attributes: [NSAttributedStringKey.paragraphStyle: style]

and change your `addAttribute code to this:

let forgotCodeAttributedTitle = NSMutableAttributedString(string: "forgot_code_2_lines", attributes: [NSAttributedStringKey.paragraphStyle: style])

Or, even simpler, use this code to set paragraph styling and foreground color in a single statement:

let forgotCodeAttributedTitle = NSMutableAttributedString(string: "forgot_code_2_lines", attributes: 
    [NSAttributedStringKey.paragraphStyle: style, 
     NSAttributedStringKey.foregroundColor: UIColor.red])

NSMutableAttributedString text color not working correctly

Here is the solution to your problem. In Swift 4.0 and later, there is struct called NSAttributedStringKey which define the keys for string attributes.

let timeduration = NSMutableAttributedString.init(string: "a dynamic string of time")

timeduration.addAttribute(NSAttributedStringKey.font, value: UIFont.systemFont(ofSize: 16), range: NSRange(location: 0, length: timeduration.length))

timeduration.addAttribute(NSAttributedStringKey.foregroundColor, value: 

UIColor(red: 200/255, green: 200/255, blue: 200/255, alpha: 1.0), range: 
NSRange(location: 0, length: timeduration.length))

timeduration.addAttribute(NSAttributedStringKey.font, value: UIFont.systemFont(ofSize: 50), range: NSRange(location: 0, length: timecount))

timeduration.addAttribute(NSAttributedStringKey.font, value: UIFont.systemFont(ofSize: 25), range: NSRange(location: timecount, length: 2))

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