Where and how is the coordinate system for displaying elements implemented in UIKit?

In UIKit, the coordinate system is implemented in the UIView space, where the point (0, 0) is located at the top-left corner of the screen or parent view.

Coordinates increase to the right along the X axis and downward along the Y axis. This means that for positioning elements:

• X — offset to the right
• Y — offset downward

For example, if a UIView has a frame with origin (10, 20), then the top-left corner of this view is 10 points to the right and 20 points down relative to the parent view.

This is the standard coordinate system for iOS, which simplifies positioning and animation of interface elements.