Corona “Attempt to remove an object that has already been removed”

s0527705277 · June 26, 2013, 4:42pm

I’m working on a simple “breakout” game and I have problem reloading a map.

for example: if I start with level1, break some bricks and lose, than I’m loading the same map again. next time that the ball collides with the same brick I “touched” before, will give me an error Attempt to remove an object that has already been removed

&nbsp; &nbsp; local map = lime.loadMap("maps/" .. currentLevel .. ".tmx") &nbsp; &nbsp; local layer = map:getTileLayer("bricks\_1") &nbsp; &nbsp; local visual = lime.createVisual(map) &nbsp; &nbsp; local physical = lime.buildPhysical(map) &nbsp; &nbsp; function removeBricks(event) &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;if event.other.isBrick then &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;local brick = event.other &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;transition.to(brick, {time = 20, alpha = 0}) &nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;score = score + brick.scoreValue &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ScoreNum.text = score&nbsp; &nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-- remove brick &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;brick:removeSelf() &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;brick = nil &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;... &nbsp;

roaminggamer · June 26, 2013, 6:07pm

Consider adding some safety checks like this (also modified code so fade will happen before removal):

&nbsp;local fadeTime &nbsp;= 20 &nbsp;function removeBricks(event) &nbsp; &nbsp; &nbsp; &nbsp; if event.other.isBrick then &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; local brick = event.other &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; transition.to(brick, {time = fadeTime, alpha = 0}) &nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; score = score + brick.scoreValue &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ScoreNum.text = score&nbsp; &nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; -- remove brick &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; timer.performWithDelay( fadeTime + 10,&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;function() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if( brick.removeSelf and&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;type(brick.removeSelf) == "function") then&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;brick:removeSelf() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;end ) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ... &nbsp;

s0527705277 · June 26, 2013, 6:53pm

roaminggamer:

Consider adding some safety checks like this (also modified code so fade will happen before removal):

&nbsp;local fadeTime &nbsp;= 20 &nbsp;function removeBricks(event) &nbsp; &nbsp; &nbsp; &nbsp; if event.other.isBrick then &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; local brick = event.other &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; transition.to(brick, {time = fadeTime, alpha = 0}) &nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; score = score + brick.scoreValue &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ScoreNum.text = score&nbsp; &nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; -- remove brick &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; timer.performWithDelay( fadeTime + 10,&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;function() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if( brick.removeSelf and&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;type(brick.removeSelf) == "function") then&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;brick:removeSelf() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;end ) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ... &nbsp;

didn’t help

roaminggamer · June 26, 2013, 6:07pm

Consider adding some safety checks like this (also modified code so fade will happen before removal):

&nbsp;local fadeTime &nbsp;= 20 &nbsp;function removeBricks(event) &nbsp; &nbsp; &nbsp; &nbsp; if event.other.isBrick then &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; local brick = event.other &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; transition.to(brick, {time = fadeTime, alpha = 0}) &nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; score = score + brick.scoreValue &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ScoreNum.text = score&nbsp; &nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; -- remove brick &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; timer.performWithDelay( fadeTime + 10,&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;function() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if( brick.removeSelf and&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;type(brick.removeSelf) == "function") then&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;brick:removeSelf() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;end ) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ... &nbsp;

s0527705277 · June 26, 2013, 6:53pm

roaminggamer:

Consider adding some safety checks like this (also modified code so fade will happen before removal):

&nbsp;local fadeTime &nbsp;= 20 &nbsp;function removeBricks(event) &nbsp; &nbsp; &nbsp; &nbsp; if event.other.isBrick then &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; local brick = event.other &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; transition.to(brick, {time = fadeTime, alpha = 0}) &nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; score = score + brick.scoreValue &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ScoreNum.text = score&nbsp; &nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; -- remove brick &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; timer.performWithDelay( fadeTime + 10,&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;function() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if( brick.removeSelf and&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;type(brick.removeSelf) == "function") then&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;brick:removeSelf() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;end ) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ... &nbsp;

didn’t help