let str = "fdasfsafaf"

letnameStr:NSMutableAttributedString=NSMutableAttributedString(string: str)

//绿色

letrange =NSMakeRange(0,5)

nameStr.addAttribute(NSForegroundColorAttributeName,value:UIColor.greenColor(),range: range)

//白色

let range2 = NSMakeRange(5,str.characters.count-5)

let lbl = UILabel(frame:

CGRectMake(0,0,100,40))

lbl.attributedText= nameStr