ViewModelHierarchy

Driving SwiftUI navigation with a hierarchy of ViewModels

This example builds upon Action emitting ViewModels and Coordinator Views, but with one change: ViewModels are now organized in an explicit hierarchy where each ViewModel is attached (and managed) by its ancestor ViewModel. Only the top most ViewModel (the "root" ViewModel) is managed as a @State/@StateObject by SwiftUI, all other ViewModels of significant importance are attached to the View hierarchy as @Bindables or @ObservableObjects.

Deep Linking

Handling deep linking with this kind of ViewModel hierarchy is also a breeze! Check out ViewModelHierarchyApp.

Example Deep Links

Using Universal Links:

Note: Need to have configured apple-app-site-association.

• https://ios.example.ViewModelHierarchy/app/root/about
• https://ios.example.ViewModelHierarchy/app/root/main/home/home
• https://ios.example.ViewModelHierarchy/app/root/main/home/profile
• https://ios.example.ViewModelHierarchy/app/root/main/more/more
• https://ios.example.ViewModelHierarchy/app/root/main/more/details
• https://ios.example.ViewModelHierarchy/app/root/main/settings

xcrun simctl openurl booted "https://ios.example.ViewModelHierarchy/app/root/about"

Or using custom URL scheme:

• ios.example.ViewModelHierarchy://ios.example.ViewModelHierarchy/app/root/about
• ios.example.ViewModelHierarchy://ios.example.ViewModelHierarchy/app/root/main/home/home
• ios.example.ViewModelHierarchy://ios.example.ViewModelHierarchy/app/root/main/home/profile
• ios.example.ViewModelHierarchy://ios.example.ViewModelHierarchy/app/root/main/more/more
• ios.example.ViewModelHierarchy://ios.example.ViewModelHierarchy/app/root/main/more/details
• ios.example.ViewModelHierarchy://ios.example.ViewModelHierarchy/app/root/main/settings