qt - 排序 QObject child

Question

我注意到 QObject::children() 方法返回一个对 QObjectList 的常量引用，其中包含 qobject 的子对象。放弃常量性并使用 qSort 对列表进行排序是否安全？

谢谢安东

Answer 1

不，你不应该这样做。这是 QObject::children() 的定义:

inline const QObjectList &children() const { return d_ptr->children; }

这意味着您直接获取内部对象列表的引用。文档说:

Note that the list order changes when QWidget children are raised or lowered. A widget that is raised becomes the last object in the list, and a widget that is lowered becomes the first object in the list.

弄乱这个列表看起来不是个好主意。