lv_obj_clean 之后，没有删除自身，内存泄露 #35
Description
请参考 https://docs.lvgl.io/master/overview/obj.html
You can remove all the children of an object (but not the object itself) using lv_obj_clean(obj).
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请参考 https://docs.lvgl.io/master/overview/obj.html
You can remove all the children of an object (but not the object itself) using lv_obj_clean(obj).