我正在看如何在屏幕上拖动东西,我唯一困惑的是传递的Canvas c对象到底是什么?
这个视图占据了整个屏幕吗?如果它被设置为Layout的子项,该怎么办?是否有多个画布(每个显示项一个),或者是否有一个整体画布,所有东西都在其上渲染?
我很难想象引擎盖下面发生了什么。
我正在看如何在屏幕上拖动东西,我唯一困惑的是传递的Canvas c对象到底是什么?
这个视图占据了整个屏幕吗?如果它被设置为Layout的子项,该怎么办?是否有多个画布(每个显示项一个),或者是否有一个整体画布,所有东西都在其上渲染?
我很难想象引擎盖下面发生了什么。
画布是屏幕的整个可绘制区域。你应该呆在视图设定的范围内,但实际上没有什么能阻止你到处画画。
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