ios开发swift Lable标签

 let label = UILabel(frame:CGRect(x:100,y:100,width:100,height:100));
        label.text = "你好";

        label.textColor = UIColor.red;
        //字体剧中,left左,right右
        label.textAlignment = .center;
        label.backgroundColor = UIColor.white;
        //文字阴影
        //灰色阴影
        label.shadowColor = UIColor.gray;
        //阴影便宜量
        label.shadowOffset = CGSize(width:1.5,height:1.5);
        //字体设置
        label.font = UIFont(name:"Zapfino",size:20);

        //文字过长时的省略方式
        label.lineBreakMode = .byTruncatingTail//隐藏尾部并且显示省略号
        //中间显示省略号
        label.lineBreakMode = .byTruncatingMiddle;
       //文字大小自适应标签宽度
        label.adjustsFontSizeToFitWidth  = true;

        //显示多行文字
        label.numberOfLines = 2;

        label.isHighlighted  = true;
        //设置文本高度颜色
        label.highlightedTextColor = UIColor.green;
        self.view .addSubview(label);

        //富文本设置
        let attributeString = NSMutableAttributedString(string:"你好 世界 !");
        //个字符字体HelveticaNeue-Bold,16号
        attributeString.addAttribute(NSAttributedStringKey.font,value:UIFont(name:"HelveticaNeue-Bold",size:16), range:NSMakeRange(0,6))

        //设置字体颜色
        attributeString.addAttribute(NSAttributedStringKey.foregroundColor, value: UIColor.blue,
                                     range: NSMakeRange(0, 3))
        //设置文字背景颜色
        attributeString.addAttribute(NSAttributedStringKey.backgroundColor, value: UIColor.green,
                                     range: NSMakeRange(3,3))
        label.attributedText = attributeString