Links to the relevant Human Interface Guidelines for SwiftUI affordances. Organized by SwiftUI types, and each contains the Apple platforms they're available on. Inspired by the WWDC session "Communication Between Designers and Engineers" https://developer.apple.com/videos/play/wwdc2017/809/.
WKInterfaceTextField documentation (no page exists in the Human Interface Guidelines)
Custom Icons (iOS 12 and Earlier)
System Icons (iOS 12 and Earlier)