These icons are called SF Symbols. There are over 2,400 symbols you can use in iOS 13and later, macOS 11 and later, watchOS 6 and later, and tvOS 13 and later. You can use a symbol everywhere you can use an image.
To browse the full set of symbols, download the SF Symbols app. For more info about SF Symbols check here.
SF Symbols 2 introduces over 750 new symbols and includes:
- Over 150 preconfigured, multicolor symbols that automatically adapt to vibrancy, accessibility settings, and appearance modes
- Negative side margins in both standard and custom symbols, giving you greater control over horizontal alignment
- Localized symbol variants for right-to-left writing systems, as well as script-specific symbols for Arabic, Devanagari, and Hebrew
let heartImage = UIImage(systemName: "heart.fill")
let heartImage = Image(systemName: "heart.fill")