func addButton(rect:(CGRect)) -> (UIButton) {                //两种方式初始化button//        var myButton = UIButton.init(frame: rect)        var myButton = UIButton.init(type: .DetailDisclosure)        //        case Custom             //自定义//        @available(iOS 7.0, *)//        case System // standard system button  //系统//        //        case DetailDisclosure  //蓝色的小箭头//        case InfoLight        //亮色感叹号//        case InfoDark         //暗色感叹号//        case ContactAdd       //十字加好                myButton.frame = rect   //设置frame        myButton.setTitle("button", forState: .Normal)  //设置文本，需要注意要指定状态。如点击时出现的文本和正常状态下的显示文本        //        public static var Normal: UIControlState { get }//        public static var Highlighted: UIControlState { get } // used when UIControl isHighlighted is set//        public static var Disabled: UIControlState { get }//        public static var Selected: UIControlState { get } // flag usable by app (see below)//        @available(iOS 9.0, *)//        public static var Focused: UIControlState { get } // Applicable only when the screen supports focus//        public static var Application: UIControlState { get } // additional flags available for application use//        public static var Reserved: UIControlState { get } // flags reserved for internal framework use                myButton.addTarget(self, action: "buttonAction", forControlEvents:.TouchUpInside )        myButton.backgroundColor = UIColor.orangeColor()  //设置背景颜色        myButton.setTitleColor(UIColor.blackColor(), forState: .Normal)  //设置字体颜色，同样需要指定状态//        myButton.setImage(<#T##image: UIImage?##UIImage?#>, forState: <#T##UIControlState#>)  //设置图片，图片会遮挡文字//        myButton.setBackgroundImage(<#T##image: UIImage?##UIImage?#>, forState: <#T##UIControlState#>) //设置背景图片                //可以设置富文本即button上的标题文字可以单独的指定字体，大小等此过程需要设置富文本属性        var buttonTextAttr:NSMutableAttributedString = NSMutableAttributedString(string: "hello,nihao")        buttonTextAttr.addAttribute(NSFontAttributeName, value: UIFont(name: "HelveticaNeue-Bold",size: 10)!, range: NSMakeRange(0,2))  //设置文字字体        buttonTextAttr.addAttribute(NSForegroundColorAttributeName, value: UIColor.redColor(), range: NSMakeRange(0, 4))  //设置文字字体颜色        buttonTextAttr.addAttribute(NSBackgroundColorAttributeName, value: UIColor.clearColor(), range: NSMakeRange(0, 6)) //设置文字背景颜色                myButton.setAttributedTitle(buttonTextAttr, forState: .Normal)                myButton.adjustsImageWhenDisabled = false  //当按钮禁用时颜色会变为深色，设置此属性就不会变为深色        myButton.showsTouchWhenHighlighted  = true  //将此属性设置为true点击按钮时会发光        myButton.adjustsImageWhenHighlighted = false //高亮状态下按钮图像颜色也会变深，可通过此属性设置                myButton.setTitleShadowColor(UIColor.blackColor(), forState: .Normal)  //设置阴影        return myButton            }        func buttonAction() {                print("nihao")    }//        点击事件触发情况有很多//        public static var TouchDown: UIControlEvents { get } // 单击触发//        public static var TouchDownRepeat: UIControlEvents { get } // 多点触摸,点击次数大于1时        //        public static var TouchDragInside: UIControlEvents { get }//触摸在控件内拖动//        public static var TouchDragOutside: UIControlEvents { get } //触摸在空间外运动//        public static var TouchDragEnter: UIControlEvents { get } //触摸从控件外移动到空间内//        public static var TouchDragExit: UIControlEvents { get }  //触摸从控件内移动到控件外//        public static var TouchUpInside: UIControlEvents { get }  //在控件内触摸抬起手指的时候//        public static var TouchUpOutside: UIControlEvents { get }  //在控件外触摸抬起手指时//        public static var TouchCancel: UIControlEvents { get }    //触摸取消时间，即一次触摸因为放了太多手指而被取消，或接电话打断//        //        public static var ValueChanged: UIControlEvents { get } // 当控件的值发生改变//        @available(iOS 9.0, *)//        public static var PrimaryActionTriggered: UIControlEvents { get } // semantic action: for buttons, etc.//        //        public static var EditingDidBegin: UIControlEvents { get } // UITextField 文本开始编辑//        public static var EditingChanged: UIControlEvents { get } //文本改变//        public static var EditingDidEnd: UIControlEvents { get }  //结束编辑//        public static var EditingDidEndOnExit: UIControlEvents { get } // 'return key' ending editing  按下回车键时//        //        public static var AllTouchEvents: UIControlEvents { get } // for touch events  通知所有触摸事件//        public static var AllEditingEvents: UIControlEvents { get } // for UITextField  通知所有编辑事件//        public static var ApplicationReserved: UIControlEvents { get } // range available for application use//        public static var SystemReserved: UIControlEvents { get } // range reserved for internal framework use//        public static var AllEvents: UIControlEvents { get }