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当我尝试与 BCloud1.png 床发生碰撞时,我试图索引全局“BCoud1”(一个零值)?有什么简单的方法可以解决这个错误吗?

我已经这样做了:

function getRandomStar()
    local temp = starTable[math.random(1, #starTable)] -- Get a random star from starTable
    local randomStar = display.newImage(temp.imgpath) -- Set image path for object

    if ( temp.imgpath == "BCloud1.png" ) then
    temp.imgpath = "BCloud"..tostring(math.random(1, 3))..".png";
    physics.addBody( BCloud1, { density=3.0, friction=0.5, bounce=0.3 } )
    end

    if ( temp.imgpath == "BCloud2.png" ) then
    temp.imgpath = "BCloud"..tostring(math.random(1, 3))..".png";
    physics.addBody( randomStar, "static", { density=.1, bounce=.1, friction=.2, radius=45 } )  
    end

    if ( temp.imgpath == "BCloud3.png" ) then
    temp.imgpath = "BCloud"..tostring(math.random(1, 3))..".png";
    physics.addBody( randomStar, "static", { density=.1, bounce=.1, friction=.2, radius=45 } )  
    end

    randomStar.myName = "star" -- Set the name of the object to star
    randomStar.movementSpeed = temp.movementSpeed; -- Set how fast the object will move
    randomStar.x = math.random(-30, _W);    
    randomStar.y = -35;
    randomStar.rotation = math.random(0,20) -- Rotate the object

    starMove = transition.to(randomStar, {
        time=randomStar.movementSpeed, 
        y=500,
        onComplete = function(self) self.parent:remove(self); self = nil; 
        end
        }) -- Move the star
end--END getRandomStar()


local function onLocalCollision1( self, event )
    if ( event.phase == "began" ) then
print (" Collision1 ")
    elseif ( event.phase == "ended" ) then
    end
end
BCloud1.collision = onLocalCollision1
BCloud1:addEventListener( "collision", BCloud1.png)
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1 回答 1

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您在哪里创建一个名为 BCloud1 的显示对象?

在您的代码中:

BCloud1.collision = onLocalCollision1
BCloud1:addEventListener( "collision", BCloud1.png)

BCloud1 需要存在,并且您发布的代码永远不会创建它。我怀疑它从您的 getRandomStar() 函数开始。您永远不会返回创建的对象。但同样在上面的 eventListener 设置中,您将 BCloud1.png 视为一个名为 BCloud1 的表,其成员名为 .png,尽管看起来,BCloud1.png 听起来像是图像的文件名。也许你错过了类似的东西:

BCloud1 = display.newImage("BCloud1.png")

于 2013-03-18T02:35:33.777 回答