Question

我有两个问题。我是什么试图做的是每次我射击敌人/藤蔓它应该是移除并发生爆炸。删除工作完美但是没有调用精灵爆炸

for循环#sections[sectInt]["vines"]中的内容是什么？他们是父/子参考吗？有人可以打破这个甚至告诉我#是什么？
每个葡萄藤被毁后如何使用我的爆炸精灵？我很难搞清楚每个x和y的调用方式在移除时，for循环中的藤蔓会爆炸。

代码：

local sections = require("sectionData")

local lastSection = 0
function createSection()
    --Create a random number. If its eqaul to the last one, random it again.
    local sectInt = mR(1,#sections)
    if sectInt == lastSection then sectInt = mR(1,#sections) end
    lastSection = sectInt

    --Get a random section from the sectionData file and then
    --Loop through creating everything with the right properties.
    local i
    -- the random creation of vines throughout the screen
    for i=1, #sections[sectInt]["vines"] do
        local object = sections[sectInt]["vines"][i]
        local vine = display.newImageRect(objectGroup, "images/vine"..object["type"]..".png", object["widthHeight"][1], object["widthHeight"][2])
        vine.x = object["position"][1]+(480*object["screen"]); vine.y = object["position"][2]; vine.name = "vine"


        local rad = (vine.width*0.5)-8; local height = (vine.height*0.5)-8
        local physicsShape = { -rad, -height, rad, -height, rad, height, -rad, height }
        physics.addBody( vine, "static", { isSensor = true, shape = physicsShape } )
    end
end

-- explosion sprite
options1 = 
{
    width = 96, height = 96,
    numFrames = 16,
    sheetContentWidth = 480,
    sheetContentHeight = 384
}
playerSheet1 = graphics.newImageSheet( "images/explosion.png", options1)
playerSprite1 = { 
    {name="explosion", start=1, count=16, time = 400, loopCount = 1 },
}

explode = display.newSprite(playerSheet1, playerSprite1)
explode.anchorX = 0.5
explode.anchorY = 1
--player:setReferencePoint(display.BottomCenterReferencePoint)

-- i want to reference the for loop position if each vine so it plays sprite when they are removed
explode.x = "vine.x" ; explode.y = "vine .y"
explode.name = "explode"
explode.position=1
extraGroup:insert(explode)

Answer 1

1）for循环#sections [sectInt] [＆＃34; vines＆＃34;]中的内容是什么？他们是父/子参考吗？有人可以将这一点告诉我甚至告诉我＃是什么吗？

正如我在评论中所说，#是table length。

循环遍历＆＃34; vine＆＃34;所选分段数据中的数据（无论这意味着什么与游戏完全相同），然后为这些葡萄藤创建对象。

Answer 2

当你的葡萄藤爆炸的时候，你会玩精灵。如果你想爆炸每一棵葡萄树，你会有类似的东西：

sheetOptions = 
{
    width = 96, height = 96,
    numFrames = 16,
    sheetContentWidth = 480,
    sheetContentHeight = 384
}
playerSheet = graphics.newImageSheet( "images/explosion.png", sheetOptions)
spriteSequence = { 
    {name="explosion", start=1, count=16, time = 400, loopCount = 1 },
}

for i, vine in ipairs(objectGroup) do
    local explode = display.newSprite(playerSheet, spriteSequence)
    explode.anchorX = 0.5
    explode.anchorY = 1
    explode.x = vine.x
    explode.y = vine.y
    explode.name = "explode"
    explode.position=1
    explode:play()

    extraGroup:insert(explode)
end

注意：未经测试，请告知我是否有任何问题无法解决。

Answer 3

好吧，这就是我为了让任何有同样问题的人让我的对象爆炸而做的事情。

function isShot( event )
           print('shot!!!')
        if (event.other.class == "enemy") then
            if (event.other.name == "limitLine") then  
                event.target:doRemove() --remove bullet if hits the limitLine

            elseif (event.other.name == "vine") then    

                event.other:doRemove()  
                spriteExplode(event.other.x, event.other.y) -- this function calls itself & runs the sprite

                if event.other.name == "vine" then
                    if event.other.name == "explode" then
                        event.other:doRemove()  --this removes the explosion sprite
                    end
               end                  
            end 
            -- remove the bullet & explosion sprite
            timer.performWithDelay( 5000, function(event) explode:doRemove(); end, 1 )
            event.target:doRemove()
       end
    return true
end

function spriteExplode( x, y)

        explode.isVisible = true
        explode:play()
        print("play explode")

        if (x and y) then   -- this is the code that keeps my sprite updating upon removal of vine
            explode.x, explode.y = x, y
        end

        function explode:doRemove(event)
            timer.performWithDelay(
                        1,
                            function(event)
                                display.remove(self)
                                self= nil
                            end,
                    1 )
        end


end

我在Bullet函数中添加了isShot函数eventListener bullet：addEventListener（＆＃34; collision＆＃34;，isShot）＆amp;一个子弹：doRemove函数也在bullet函数内。希望这有帮助。

for loop help和sprite addition

3 个答案: