SwiftUI BasicsLesson 50Free preview

SwiftUI Previews

This lesson is part of Swift · All levels

Summary

This lesson discusses Xcode Previews that allow instant previews of SwiftUI interfaces in various screen conditions. Developers will learn how the '#Preview' macro (modern in Swift 5.9+) or the earlier PreviewProvider protocol works to test the display in Dark Mode, landscape orientation, as well as dynamic font size variations.

Key points

The '#Preview' macro (Swift 5.9+) provides the most concise way to preview canvas
Allows direct review of the light mode and dark mode side-by-side displays
Supports dummy data simulation without affecting the original application database
Can test the display in various sizes Dynamic Type

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