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我已经写下面的代码来创建一个动画和一条从右向左移动的线。我的问题是，如果该线不在精灵之下，精灵不会掉下来。（CORONA SDK）精灵动画不会掉下来
local sheet1 = graphics.newImageSheet("hero.png", { width=135, height=259, numFrames=14 })
local hero = display.newSprite(sheet1, { name="hero", start=1, count=14, time=450 })
hero.timeScale = 1.0
hero.x = _W/2-400
hero.y = _H/2+180
hero.alpha = 1
hero.myName = "hero"
hero:play()
physics.addBody(hero, "dynamic", { friction=0.0, bounce=0 })
hero.isFixedRotation=true
local linea = display.newRect(_H/2,math.random(_H/2+290,_H/2+400),1250,10)
linea:setFillColor(255,0,0)
linea.alpha = 0.5
linea.myName = "linea"
physics.addBody(linea, "static", { friction = 0, bounce = 0 })
local function muoviLinea()
linea.x = linea.x - velocita
linea2.x = linea2.x - velocita
if(linea.x<-712)then
linea.x = _W/2
linea.y = math.random(_H/2+290,_H/2+400)
end
end
Runtime:addEventListener("enterFrame", muoviLinea)
如果，而不是一个精灵，我使用
local hero = display.newRect(100,100,10,10)
physics.addBody(hero, "dynamic", { friction=0.0, bounce=0 })
一切正常，因为它应该。
我在做什么错？谢谢。