What to use for AttributeName in Xamarin Mac

Question

I am trying to colorize a substring in my NSMutableAttributedString in Xamarin, but it seems to lack the correct constants,

What should I do there?

Update . This is approaching:

var s = new NSMutableAttributedString ("hello"); s.AddAttribute (CTStringAttributeKey.ForegroundColor , NSColor.Red, new NSRange (0, 3)); wordLabel.AttributedStringValue = s; 

and gives

although the color on the screen is still black text!

Update2 Perhaps CTStringAttributeKey is incorrect, but no NSStringAttributeKey

Answer 1

Ok, so I looked at the API and it seems there, just below NSAttributedString

ForegroundColorAttributeName

So use something like:

 s.AddAttribute(NSAttributedString.ForegroundColorAttributeName, NSColor.Red, new NSRange(0,3)); 

Answer 2

In case people are wondering what is equivalent for Xamarin iOS, here it is: The name of the foreground color attribute can be found here: UIStringAttributeKey.ForegroundColor

Also NSColor.Red should be UIColor.Red

Therefore, adding an attribute should look like this:

 s.AddAttribute(UIStringAttributeKey.ForegroundColor, UIColor.Red, new NSRange(0,3)); 

Answer 3

Important:

The keys in Xamarin.Mac have changed from NSAttributedString to NSStringAttributeKey , so that:

 s.AddAttribute(NSAttributedString.ForegroundColorAttributeName, NSColor.Red, new NSRange(0,3)); 

Must be:

 s.AddAttribute(NSStringAttributeKey.ForegroundColorAttributeName, NSColor.Red, new NSRange(0,3)); 

Answer 4

I can confirm that what was said above is the correct answer:

 s.AddAttribute(UIStringAttributeKey.ForegroundColor, UIColor.Red, new NSRange(0,3)); 

The value of NSRange seems to refer to the length of the string. Therefore, if a string of length 5 long, NSRange must be NSRange(0, 5) .

Answer 5

I could not get these solutions to work because it could not convert from NSMutableAttributedString to UIStringAttributes . Therefore, after playing with the code a bit, I got this working solution:

 UINavigationBar.Appearance.TitleTextAttributes = new UIStringAttributes { ForegroundColor = UIColor.White }; 

This is for Xamarin.iOS, complementing Mike Richards answer. I never developed for Xamarin.Mac, so I don't know if it will work there.