Canvas画布 The Canvas is the area that all UI elements should be inside. The Canvas is a Game Object with a Canvas component on it, and all UI elements must be children of such a Canvas.Canvas是一个应该包含所有UI元素的区域.画布是一个带有画布组件的游戏物体,并且所有的UI元素都应该是这个画布的子物体. Cre…