我即將完成我的比賽,但我遇到了一個錯誤比較爲零:嘗試用數字電暈
attempt to compare nil with number game2.lua 444
我沒有就如何解決這個線索,我已經嘗試了一切,沒有成功。我認爲功能scrollSpace
正在造成這種情況,因爲有時背景會以不可控制的速度滾動。這是我的代碼:
function scrollSpace(self,event)
if self.x < -900 then
self.x = 800
else
self.x = self.x - self.speed
end
end
這控制着東西如何滾動屏幕。如果你們有更多的代碼,只需回覆,我很樂意添加請求的源代碼。最後一兩件事:沒有人知道下面的錯誤方式:
attempt to compare nil with number
這是我的文件代碼:
coin01 = display.newImage("coin02.png")
coin01.y = 100
coin01.x = 500
coin01.speed = math.random(2,6)
coin01.initY = mine1.y
coin01.amp = math.random(20,100)
coin01.angle = math.random(1,360)
physics.addBody(coin01, "static", {density=.1,bounce=0.1, friction=.2,radius=12})
screenGroup:insert(coin01)
end -- end of create scene
**print "passed"
function scrollSpace(self,event)
if self.x < -900 then
self.x = 800
else
self.x = self.x - self.speed
end
end**
function scene:enterScene(event)
coin01.enterFrame = coins
Runtime:addEventListener ("enterFrame",coin01)
end
function scene:exitScene(event)
***storyboard . purgeScene ("start")
story board . purgeScene ("restart")***
Runtime:removeEventListener ("enterFrame",coin01)
end
function scene:destroyScene(event)
end
scene:addEventListener("createScene",scene)
scene:addEventListener("enterScene",scene)
scene:addEventListener("exitScene",scene)
scene:addEventListener("destroyScene",scene)
return scene
可能重複[嘗試比較零與數字](http://stackoverflow.com/questions/17625414/attempt-to-compare-nil-with-number) – iagreen