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然后在飞机上已被添加到游戏，下一步是让它动起来。主要是为了应对触摸事件。

在C++通过重写ccTouchBegan()、ccTouchMoved()、ccTouchEnded()三个函数来响应触摸事件。

在Lua器中就能够了。

1.先设置该图层能够触摸。然后注冊响应函数onTouch

	gameLayer:setTouchEnabled(true)gameLayer:registerScriptTouchHandler(onTouch)

2.onTouch函数有3个參数，第一个是事件的类型（began、moved、ended），后面两个參数就不用多说了。

function onTouch(eventType, x, y)if eventType == "began" then   return onTouchBegan(x, y)elseif eventType == "moved" thenreturn onTouchMoved(x, y)elsereturn onTouchEnded(x, y)end
end

3.分别实现3个触摸事件

local touchBeginPoint = nil
function onTouchBegan(x, y)touchBeginPoint = {x = x, y = y}return true
endfunction onTouchMoved(x, y)if PlaneLayer.alive() and PlaneLayer.containsTouchLocation(x,y) then --local offset = ccpSub(ccp(touchBeginPoint['x'],touchBeginPoint['y']),ccp(x,y))--local toPoint = ccpAdd(ccp(PlaneLayer.getPlane():getPositionX(),PlaneLayer.getPlane():getPositionY()),offset)PlaneLayer.moveTo(x,y)end
endfunction onTouchEnded(x, y)end

4.在onTouchMoved函数中出现了一个没见过的函数PlaneLayer.containsTouchLocation(x,y)。这种方法用来推断想触摸点是否在飞机的位置上。

function containsTouchLocation(x,y)local planeRect = plane:boundingBox()planeRect.origin.x = planeRect.origin.x - 15planeRect.origin.y = planeRect.origin.y - 15planeRect.size.width = planeRect.size.width + 30planeRect.size.height = planeRect.size.height + 30local b = planeRect:containsPoint(ccp(x,y))return b
end