SWIFT – NSFONTATTRIBUTEDSTRING Work before Xcode 6.1

let timeFont = [NSFontAttributeName:UIFont(name: "Voyage", size: 20.0)]
var attrString3 = NSAttributedString("(Time)", attributes: timeFont); // <--- compiler error "Extra argument in call"

This code runs in xcode 6.0, but now I have upgraded to xcode 6.1 it no longer works, I can’t get it Be clear about what I need to make it work again. It says there is an additional argument, but this is not correct. I believe it has to do with the new available initializer, but everything I have tried does not work.

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if let font = UIFont(name: "Voyage", size: 20.0) {
 let timeFont = [NSFontAttributeName:font ]
 var attrString3 = NSAttributedString(string: "(Time)", attributes: timeFont)
}

let timeFont = [NSFontAttributeName :UIFont(name: "Voyage", size: 20.0)]
var attrString3 = NSAttributedString("(Time)", attributes: timeFont); // <--- compiler error "Extra argument in call" 
This code runs in xcode 6.0, but now I have upgraded to xcode 6.1 it doesn't work anymore, I don’t How to figure out what I need to make it work again. It says there is an additional argument, but this is not correct. I believe it has to do with the new available initializer, but everything I tried didn't work.
Xcode 6.1 comes with Swift 1.1, which supports constructors that may fail. UIFont initialization may fail and return zero. String is also used when creating NSAttributedString: 
 
 
if let font = UIFont(name: "Voyage", size: 20.0) {
 let timeFont = [NSFontAttributeName:font]
 var attrString3 = NSAttributedString( string: "(Time)", attributes: timeFont)
}