delphi构造&析构调用顺序
_ClassCreate
->Create
->AfterConstruction(->DoCreate / OnCreate)
BeforeDestruction(->DoDestroy / OnDestroy)
->Destroy
->_ClassDestroy
_ClassCreate
->Create
->AfterConstruction(->DoCreate / OnCreate)
BeforeDestruction(->DoDestroy / OnDestroy)
->Destroy
->_ClassDestroy