删除复杂实体

如果应用程序删除不是数据库驻留的复杂实体，则应用程序还负责删除与该复杂实体关联的所有子实体。

复杂实体及其子实体列在“定义的实体”部分中。不是数据库驻留的复杂实体不包括对象。AcDbSequenceEnd

以下示例演示如何删除 AcDb2dPolyline 的子实体：

void delete2dPoly(AcDb2dPolyline* pPline)
{ 
  AcDbObjectIterator* pIter=pPline->vertexIterator();
  AcDbEntity* pEnt; 
  for (; !pIter->done(); )
  {
    pEnt=pIter->entity(); 
    // Must step the iterator first so that it is no longer 
    // sitting on the entity that's about to be deleted.
    pIter->step();
    delete pEnt;
  }
  
  delete pIter;
  delete pPline;
}