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Tencent / UnLua

A feature-rich, easy-learning and highly optimized Lua scripting plugin for UE.
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lua重写ReceiveBeginPlay，加上蓝图调用【父类：ReceiveBeginPlay】的时候，会出问题 #722

Open shuitian opened 2 months ago

shuitian commented 2 months ago

测试环境： 蓝图类

  1. DebugBattleBug 只连了ReceiveBeginPlay image 父类实现了unlua插件 image

  2. DebugBattleBug_Child 是DebugBattleBug的子类，蓝图里调用了父类的ReceiveBeginPlay image

  3. lua代码中，实现了ReceiveBeginPlay image

  4. 在测试场景中拖入两个DebugActor image

  5. 开始运行，会出问题

由于这里调用父类的ReceiveBeginPlay，实际上会调用到lua中去，又会调用到子类蓝图中，疑似出现死循环？

HuaNanHYC commented 2 months ago

对的，因为编辑器在运行时检测到UObject才会绑定Lua文件； 如果世界中只有Child，那么父类的ReceiveBeginPlay就只是一个打印字符串，Child中调用的父类函数只是打印字符串； 但是父类也放到世界中运行时就会绑定，父类的ReceiveBeginPlay就变成了self.Overridden.ReceiveBeginPlay(self)，那在Child的ReceiveBeginPlay中调用的就是self.Overridden.ReceiveBeginPlay(self)，会形成死循环。

BaconVN commented 1 month ago

Cherry pick this PR. This should solve the problem.

https://github.com/Tencent/UnLua/pull/719