swift 动态获取label宽度或高度

func getLabHeigh(labelStr:String,font:UIFont,width:CGFloat) -> CGFloat {

let statusLabelText: NSString = labelStr

let size = CGSizeMake(width, 900)

let dic = NSDictionary(object: font, forKey: NSFontAttributeName)

let strSize = statusLabelText.boundingRectWithSize(size, options: .UsesLineFragmentOrigin, attributes: dic as? [String : AnyObject], context: nil).size

return strSize.height

}

func getLabWidth(labelStr:String,font:UIFont,height:CGFloat) -> CGFloat {

let statusLabelText: NSString = labelStr

let size = CGSizeMake(900, height)

let dic = NSDictionary(object: font, forKey: NSFontAttributeName)

let strSize = statusLabelText.boundingRectWithSize(size, options: .UsesLineFragmentOrigin, attributes: dic as? [String : AnyObject], context: nil).size

return strSize.width

}