c++ - 内存管理 - addwidget 是否分配父级

Question

假设我有这样的东西

void someClass::start()
{
    QLabel* sb = new QLabel();
    sb->setText("Hello World");
    ui.verticalLayout->addWidget(sb);
}

addWidget 是否使 sb 成为 someClass 的子级，以便在我删除 someClass 时 sb 也被删除？如果这是真的，我怎么知道通常哪些方法将父对象分配给对象？

Answer 1

来自 http://qt-project.org/doc/qt-4.8/layout.html :

When you use a layout, you do not need to pass a parent when constructing the child widgets. The layout will automatically reparent the widgets (using QWidget::setParent()) so that they are children of the widget on which the layout is installed.