iOS坐标系的深入探究 前言 app在渲染视图时,需要在坐标系中指定绘制区域. 这个概念看似乎简单,事实并非如此. When an app draws something in iOS, it has to locate the drawn content in a two-dimensional space defined by a coordinate system. This notion might seem straightforward at first glance, but it isn’t. 正文 我
