:FingerAction
引擎内部默认的手指动作响应。提供手指抬起和落下的图像，以及动作图像呈现的时间。durationForPrepare : 手指准备动作的图像呈现时间，比如一次点击，手指抬起图片的显示时间durationFroHold:手指执行动作的图像呈现时间，比如一次点击，手指按下的图片显示时间
IX54FingerActionInterface
+ fingerUp+ fingerDown+(X54FingerActionStatus)fingerStatus
X54FingerImageCell
+img:+anchorPoint:
fingerActionDelegate
X54FingerActionStatus
X54FingerActionStatus_UpX54FingerActionStatus_Down
X54GestureGenerator
+fingerAction:X54FingerAction+fingerActionDelegate:X54FingerActionDelegate+gestureActionDelegate:X54GestureActionDelegate+durationForPrepare:+durationForHold:
touchDownAtPoint:touchUpAtPoint:tapAtPoint:times:moveFrom:to:
X54GesturePresentationEngine
功能介绍————————————————GesturePresentationEngine提供手势的模拟。提供手指移动，单击的动画。主要提供以下两项功能：1:）手势的呈现（例如屏幕上出现手指的动作动画）2:）发出手势消息 （但是并不向系统发送手势的模拟，而是需要用户实现gestureActionDelegate，在代理里调用原本处理系统手势的方法。
X54FingerActionDelegate
+ onFingerUp- onFingerDown
X54GestureActionDelegate
onTouchDownAtPoint:onView:onTouchUpAtPoint:onView:onTapAtPoint:repeat:onView:onMoveFrom:to:duration:onView:
X54FingerAction
+fingerUpImgCell:+fingerDownImgCell:+delegate:X54FingerActionDelegate
+setImage:withAnchorPoint:forStatus:+installIntoView:+contentView
gestureActionDelegate
:GestureGenerator
用例：1:)创建引擎实例X54GesturePresentationEngine* engine = [X54GesturePresentationEngine defaultEngine];2:)发起手势移动动作手指从p1点移动到p2点，执行时间为0.8秒[engine.gestureGenerator moveFrom:pt1 to:pt2 duration:0.8 ];3:）发起手势点击动作手指在pt2单击[engine.gestureGenerator clickAt:pt2];//高级进阶注意：这个引擎并不会真的触发系统手势，如何在引擎触发手势的时候，触发用户现有系统的手势？可以实现engine里gestureActionDelegate的代理，然后在gestureActionDelegate的方法里调用现有系统的手势响应逻辑
+gestureGenerator:X54GestureGenerator+fingerActionDelegate:X54FingerActionDelegate+gestureActionDelegate:X54GestureActionDelegate
+installIntoView:
gestureGenerator
IX54GestureActionInterface
touchDownAtPoint:onView:touchUpAtPoint:onView:tapAtPoint:repeat:onView:moveFrom:to:duration:onView:
