NSAttributed string for UISegmentedControl

Question

I'm trying to set custom spacing to my UISegmented Control. How can I define the NSKernAttributeName and value attribute to define custom spacing between the letters?

[myUIControl setTitleTextAttributes:@{ NSForegroundColorAttributeName : [UIColor whiteColor], NSFontAttributeName: [UIFont fontWithName:myFont size:13]} forState:UIControlStateSelected];

This is how it is done for a UIButton

[attributedString addAttribute:NSKernAttributeName
                         value:@(dinSpacing)
                         range:NSMakeRange(0, [myString length])];