SwiftUI App Life Cycle: Examples Collection (2020)
This collection will update frequently until WWDC2021. Bookmark now!

Are you trying to build your first app with SwiftUI? Don’t know how to get started? You can find some resources and sample codes for SwiftUI App Life Cycle here.
Environment: iOS14 / iPadOS 14 / macOS 11
Tool: Xcode 12
If you need to register / enroll Apple developer Account, read this first:
Tip: Search with shortcut CMD + F 👨💻
Here’re the code examples.
A-Z
App Clip (App Clips)
ARKit
UIKit only!
CloudKit
Cross-Platform
Firebase
Analytics
Auth
App Tracking Transparency
Identifier for Advertisers (IDFA)
FaceID
Coming Soon…
Localization
Notification
CloudKit
Coming Soon…
SceneKit
UIKit only!
Sidebar
macOS
Sign in with Apple
VisionKit
n.a.
Widget
Useful Link
If you have any good resources want to share with us, feel free to comment below!