Catalyst SwiftUI app, with Unified Toolbar

An example of a Catalyst app, built using the SwiftUI Lifecycle, and using the Unified Toolbar.

SwiftUI and Catalyst with the Mac Idiom has come a long way in iOS 15/macOS 12, but it still lags behind pure iOS or macOS implementation, especially around Window management. This project is an example of how you can get the awesome-looking Unified Toolbar design with SwiftUI and Catalyst.

Key Points

• Add the toolbar to the required WindowGroup by using withHostingView (defined here) to get a handle to the titlebar object. Configure the look of the toolbar here, and add controls.

• To prevent the ToolbarDelegate from being created multiple times, it is implemented as a singleton, and shared state is passed in separately, via the initialize method

• Remove the space at the top of the views in the NavigationView with .navigationBarHidden(true)