Custom layout

Suppose that you have some special requirement for the design of the layout of a “grid” that cannot be achieved by placing items on an orthogonal geometrical grid. Instead, you would like them to be positioned according to some other arbitrary geometrical requirement that is not implemented natively in SwiftUI.

In SwiftUI, Layout is a protocol that allows you to precisely create your own custom layouts to arrange subviews within a container, according to your own geometrical choice.

By conforming to Layout, you can design layouts to fit your own design requirements. In order to create a custom layout, you need to implement two main functions:

• sizeThatFits(proposal:subviews:cache:): This function calculates the ideal size for the layout based on the proposed size and the cell it contains. It returns a CGSize that represents the ideal size for the layout.
• placeSubviews(in:proposal:subviews:cache:): This function is responsible for computing...