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[cpp-tests] SpritePolygonTest invoke UISlide::setPercent after initialization #19676

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Merged
merged 3 commits into from
May 10, 2019
Merged

[cpp-tests] SpritePolygonTest invoke UISlide::setPercent after initialization #19676

merged 3 commits into from
May 10, 2019

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PatriceJiang
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@PatriceJiang PatriceJiang commented May 8, 2019 •
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PR #19556 cause crash when invoke setPercent

For example:

cocos2d-x/tests/cpp-tests/Classes/SpritePolygonTest/SpritePolygonTest.cpp

Lines 298 to 303 in d6b8e99

slider->addEventListener(CC_CALLBACK_2(SpritePolygonTestSlider::changeEpsilon, this));
slider->setPercent((int)(sqrtf(1.0f/19.0f)*100));
auto ttfConfig = TTFConfig("fonts/arial.ttf", 8);
_epsilonLabel = Label::createWithTTF(ttfConfig, "Epsilon: 2.0");
addChild(_epsilonLabel);

  • setPercent will trigger changeEpsilon()
  • changeEpsilon() will access _epsilonLabel which is not initialized by then

Fix

delay the trigger of event ON_PERCENTAGE_CHANGED

invoke setPercent after initialization completed.
@PatriceJiang PatriceJiang added this to the metal-support milestone May 8, 2019
@PatriceJiang PatriceJiang changed the title Delay onProgressChange event when setProgress Delay ON_PERCENTAGE_CHANGED event when setPercent May 8, 2019
@PatriceJiang PatriceJiang changed the title Delay ON_PERCENTAGE_CHANGED event when setPercent [UISlider] Delay ON_PERCENTAGE_CHANGED event when setPercent May 8, 2019
@PatriceJiang PatriceJiang marked this pull request as ready for review May 8, 2019 02:08
@minggo
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minggo commented May 9, 2019

So v3 will crash too?
@PatriceJiang
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yes, v3 will also crash
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minggo commented May 9, 2019

I think the modification is not reasonable, the game logic should make sure the variable is valid.
@PatriceJiang
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I have revert these modifications and fix the bug in test case.
@PatriceJiang PatriceJiang changed the title [UISlider] Delay ON_PERCENTAGE_CHANGED event when setPercent [cpp-tests] SpritePolygonTest int UISlide::setPercent after initialization May 9, 2019
@PatriceJiang PatriceJiang changed the title [cpp-tests] SpritePolygonTest int UISlide::setPercent after initialization [cpp-tests] SpritePolygonTest invoke UISlide::setPercent after initialization May 9, 2019
@minggo minggo merged commit bd76e89 into cocos2d:metal-support May 10, 2019
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minggo commented May 10, 2019

please send a PR to 3.17.2 branch.
PatriceJiang added a commit to PatriceJiang/cocos2d-x that referenced this pull request May 13, 2019
@PatriceJiang
[cpp-tests] SpritePolygonTest invoke UISlide::setPercent after init…
8b05e77 
…ialization (cocos2d#19676) * delay onProgressChange event when setProgress * Revert "delay onProgressChange event when setProgress" This reverts commit a9ad090. * setPercent after initialization
PatriceJiang added a commit to PatriceJiang/cocos2d-x that referenced this pull request May 13, 2019
@PatriceJiang
[cpp-tests] SpritePolygonTest invoke UISlide::setPercent after init…
9f295e2 
…ialization (cocos2d#19676) * delay onProgressChange event when setProgress * Revert "delay onProgressChange event when setProgress" This reverts commit a9ad090. * setPercent after initialization
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