Touch Events

1. Events.TouchStart — Start a touch/click. 译：开始触摸/点击
2. Events.TouchMove — Touch move or mouse drag. 译：触摸或移动鼠标
3. Events.TouchEnd — End touch or click. 译：结束接触或点击。

layerA = new Layer

＃Returns the event and the layer 
layerA.on Events.TouchStart, (event, layer) ->
    print event, layer

Touch Event Shortcuts
译：触摸事件快捷键

＃For Events.TouchStart 
layerA.onTouchStart ->
    print "Start touch"

＃For Events.TouchMove     
layerA.onTouchMove ->
    print "Touch move"

＃For Events.TouchEnd 
layerA.onTouchEnd ->
    print "End touch"