Drawing SwiftUI reference

Use Canvas when a visual is easier to draw than compose from many nested views, such as sparklines, badges, waveforms, and lightweight charts.

Resize bitmap images and SF Symbols predictably by separating intrinsic image behavior, content mode, and symbol styling.

Build reusable visual primitives with Shape, Path, stroke, fill, and trim instead of baking every decoration into image assets.

Choose linear, radial, angular, image, and mesh-style fills based on the job the color is doing in the interface.

Swift Charts builds charts from marks — BarMark, LineMark, PointMark, AreaMark, SectorMark — each mapping data fields to visual position, with foregroundStyle(by:) for series.