App:Library:LVGL:docs:Overview:Layers

https://docs.lvgl.io/8.2/overview/layer.html

英文	自動翻訳

Layers

Order of creation

By default, LVGL draws new objects on top of old objects.

For example, assume we add a button to a parent object named button1 and then another button named button2. Then button1 (along with its child object(s)) will be in the background and can be covered by button2 and its children.

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