UIControlEvents 个人总结

API：

public struct UIControlEvents : OptionSetType {
    public init(rawValue: UInt)
    
    public static var TouchDown: UIControlEvents { get } // on all touch downs
    public static var TouchDownRepeat: UIControlEvents { get } // on multiple touchdowns (tap count > 1)
    public static var TouchDragInside: UIControlEvents { get }
    public static var TouchDragOutside: UIControlEvents { get }
    public static var TouchDragEnter: UIControlEvents { get }
    public static var TouchDragExit: UIControlEvents { get }
    public static var TouchUpInside: UIControlEvents { get }
    public static var TouchUpOutside: UIControlEvents { get }
    public static var TouchCancel: UIControlEvents { get }
    
    public static var ValueChanged: UIControlEvents { get } // sliders, etc.
    @available(iOS 9.0, *)
    public static var PrimaryActionTriggered: UIControlEvents { get } // semantic action: for buttons, etc.
    
    public static var EditingDidBegin: UIControlEvents { get } // UITextField
    public static var EditingChanged: UIControlEvents { get }
    public static var EditingDidEnd: UIControlEvents { get }
    public static var EditingDidEndOnExit: UIControlEvents { get } // 'return key' ending editing
    
    public static var AllTouchEvents: UIControlEvents { get } // for touch events
    public static var AllEditingEvents: UIControlEvents { get } // for UITextField
    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 }
}

代码：

        let btn = UIButton(frame: CGRectMake( 20 , 80 , 100 , 50))
        btn.layer.borderWidth = 1
        btn.layer.masksToBounds = true
        btn.layer.cornerRadius = 5
        btn.setTitle("btn title", forState: UIControlState.Normal)
        btn.setTitleColor(UIColor.blackColor(), forState: UIControlState.Normal)
        self.view.addSubview(btn)
        
        btn.addTarget(self, action: "TouchDownAction:", forControlEvents: UIControlEvents.TouchDown)
        btn.addTarget(self, action: "TouchDownRepeatAction:", forControlEvents: UIControlEvents.TouchDownRepeat)
        btn.addTarget(self, action: "TouchDragEnterAction:", forControlEvents: UIControlEvents.TouchDragEnter)
        btn.addTarget(self, action: "TouchDragExitAction:", forControlEvents: UIControlEvents.TouchDragExit)
        btn.addTarget(self, action: "TouchDragInsideAction:", forControlEvents: UIControlEvents.TouchDragInside)
        btn.addTarget(self, action: "TouchDragOutsideAction:", forControlEvents: UIControlEvents.TouchDragOutside)
        btn.addTarget(self, action: "TouchUpInsideAction:", forControlEvents: UIControlEvents.TouchUpInside)
        btn.addTarget(self, action: "TouchUpOutsideAction:", forControlEvents: UIControlEvents.TouchUpOutside)
        btn.addTarget(self, action: "TouchCancelAction:", forControlEvents: UIControlEvents.TouchCancel)
        btn.addTarget(self, action: "PrimaryActionTriggeredAction:", forControlEvents: UIControlEvents.PrimaryActionTriggered)

action方法：

    func TouchDownAction(sender:AnyObject?){
        print("TouchDown Action")
    }
    func TouchDownRepeatAction(sender:AnyObject?){
        print("TouchDownRepeat Action")
    }
    func TouchDragEnterAction(sender:AnyObject?){
        print("TouchDragEnter Action")
    }
    func TouchDragExitAction(sender:AnyObject?){
        print("TouchDragExit Action")
    }
    func TouchDragInsideAction(sender:AnyObject?){
        print("TouchDragInside Action")
    }
    func TouchDragOutsideAction(sender:AnyObject?){
        print("TouchDragOutside Action")
    }
    func TouchUpInsideAction(sender:AnyObject?){
        print("TouchUpInside Action")
    }
    func TouchUpOutsideAction(sender:AnyObject?){
        print("TouchUpOutside Action")
    }
    func TouchCancelAction(sender:AnyObject?){
        print("TouchCancel Action")
    }
    func PrimaryActionTriggeredAction(sender:AnyObject?){
        print("PrimaryActionTriggered Action")
    }

个人总结：

   单击执行顺序

TouchDown Action
TouchUpInside Action
PrimaryActionTriggered Action

    连续点击

TouchDown Action
TouchUpInside Action
PrimaryActionTriggered Action
TouchDown Action
TouchDownRepeat Action
TouchUpInside Action
PrimaryActionTriggered Action
TouchDown Action
TouchDownRepeat Action
TouchUpInside Action
PrimaryActionTriggered Action

    重点

在按钮内按下执行TouchDown，向外滑动执行TouchDragInside，滑到边界执行TouchDragExit，滑到边界外执行TouchDragOutside，再次滑到边界执行TouchDragEnter，滑到边界内执行TouchDragInside。

在按钮外松开执行TouchUpOutside

在按钮内松开执行TouchUpInside