Swift文本标签(UILabel)的用法

import UIKit

class ViewController: UIViewController        ,UITextFieldDelegate,UITextViewDelegate,UIActionSheet  Delegate,UIAlertViewDelegate{
override func viewDidLoad() {
    super.viewDidLoad()
    
  //UILabel的创建
    let label:UILabel = UILabel()
    //设置frame大小
    label.frame = CGRectMake(10, 40, 200, 30)
    label.backgroundColor = UIColor.grayColor()
    label.text = "www.baidu.com"
    label.textColor = UIColor.redColor()
    //设置文字对齐方式
    label.textAlignment = NSTextAlignment.Center
    //设置阴影颜色
    label.shadowColor = UIColor.blackColor()
    //设置阴影大小
    label.shadowOffset = CGSizeMake(-5, 5)
    label.font = UIFont(name: "Zapfino", size: 20)
    //文字过长时省略形式
    label.lineBreakMode = NSLineBreakMode.ByTruncatingMiddle
    //文字大小自适应标签宽度
    label.adjustsFontSizeToFitWidth = true
    //显示文字行数设置(默认显示是1行)
    label.numberOfLines = 0
    //设置文本高亮
    label.highlighted = true
    //设置文本高亮颜色
    label.highlightedTextColor = UIColor.greenColor()
    
    
    //富文本设置
    
//        var attributeString =NSMutableAttributedString(string: "www.cometoqingdao")
//        attributeString.addAttribute(NSFontAttributeName, value: UIFont(name: "HelveticaNeue-Bold", size: 16)!, range: NSMakeRange(0,6))
//        attributeString.addAttribute(NSForegroundColorAttributeName, value: UIColor.whiteColor(), range: NSMakeRange(0, 3))
//        attributeString.addAttribute(NSBackgroundColorAttributeName, value: UIColor.blueColor(), range: NSMakeRange(3, 3))
//        label.attributedText = attributeString
    self.view.addSubview(label)
  }
}