Lua 中的 OOP 和事件监听器 (Corona SDK)

我在 Corona SDK 中的第一步和第一次遇到的麻烦。尝试制作两个盒子，我可以通过以下方式移动它们this http://www.ludicroussoftware.com/blog/2011/07/06/simple-oop-with-inheritance-in-corona/OOP教程，但这不起作用。我已经成功创建了两个盒子，但只有一个是可移动的。当我尝试移动另一个时，它没有移动，但第一个正在移动。猜测范围有问题，但无法确定具体位置。 感谢您的任何帮助。

tile.lua源代码：

module (..., package.seeall)


function new(initX, initY)

    local scrnWidth = display.stageWidth
local scrnHeight  = display.stageHeight
local squareSize = (scrnWidth*0.9)/4

   local tile = display.newRect( initY, initY, squareSize, squareSize )

   function move(direction)
       if direction == "left" then
            transition.moveTo(tile, {x = tile.x+squareSize,y = tile.y,time = 200})
    elseif direction == "right" then
            transition.moveTo(tile, {x = tile.x-squareSize,y = tile.y,time = 200})
    elseif direction == "up" then
            transition.moveTo(tile, {x = tile.x,y = tile.y-squareSize,time = 200})
    elseif direction == "down" then
            transition.moveTo(tile, {x = tile.x,y = tile.y+squareSize,time = 200})
    end
   end


function tile:touch(event)
        if event.phase == "began" then
            display.getCurrentStage():setFocus( tile )
                beginX = event.x
                beginY = event.y
        end

        if event.phase == "ended"  then
                endX = event.x
                endY = event.y
            display.getCurrentStage():setFocus(nil)

                checkSwipeDirection();
        end
    end

function checkSwipeDirection()

        xDistance =  math.abs(endX - beginX) -- math.abs will return the absolute, or non-negative value, of a given value. 
        yDistance =  math.abs(endY - beginY)

        if xDistance > yDistance then
                if beginX > endX then
                        move("right",tile)
                else 
                       move("left",tile)

                end
        else 
                if beginY > endY then
                        move("up",tile)
                else 
                        move("down",tile)
                end
        end

end

tile:addEventListener("touch", tile)
   return tile

end

我在 main.lua 中使用以下代码创建对象：

    local tileConst = require("tile")
    local tile1 = tileConst.new(100,100)
    local tile2 = tileConst.new(200,200)

In your tile.lua场景，声明一个变量来保存下面触摸的精灵module (..., package.seeall):

local touchedSprite -- my temporary sprite variable

然后将目标精灵分配给函数内的上述变量，如下所示：

function tile:touch(event)
    touchedSprite = event.target -- Assigning target to variable
    ...
end

现在更改功能move如下：

function move(direction)
  if direction == "left" then
    transition.to(touchedSprite, {x = touchedSprite.x+squareSize,y = touchedSprite.y,time = 200})
  elseif direction == "right" then
    transition.to(touchedSprite, {x = touchedSprite.x-squareSize,y = touchedSprite.y,time = 200})
  elseif direction == "up" then
    transition.to(touchedSprite, {x = touchedSprite.x,y = touchedSprite.y-squareSize,time = 200})
  elseif direction == "down" then
    transition.to(touchedSprite, {x = touchedSprite.x,y = touchedSprite.y+squareSize,time = 200})
  end
end

请注意我已经改变了transition.moveTo to transition.to和你的transition tile to touchedSprite(target).

继续编码............:)