How do I use Swift UI to create a tab bar?

To create a tab bar using SwiftUI, you can use the new syntax introduced in iOS 18. Here's a step-by-step guide based on the information from the WWDC sessions:

1. Declare a Tab Struct: You need to declare a tab struct with a title, image, and its content view. Optionally, you can include a selection value to enable programmatic selection.

2. Ensure Type Safety: The new syntax ensures that all tabs have the same selection type and that the type matches the tab view itself.

3. Customization: You can enable user customization on a tab view by attaching a TabViewCustomization to the tab view. This allows various customization features like reordering and removing tabs.

Here is an example of how you might set up a basic tab bar in SwiftUI:

import SwiftUI

struct ContentView: View {
    @State private var selectedTab = 0

    var body: some View {
        TabView(selection: $selectedTab) {
            Text("First Tab")
                .tabItem {
                    Image(systemName: "1.circle")
                    Text("First")
                }
                .tag(0)

            Text("Second Tab")
                .tabItem {
                    Image(systemName: "2.circle")
                    Text("Second")
                }
                .tag(1)
        }
        .tabViewStyle(DefaultTabViewStyle())
    }
}

Additional Features

• Customization: To enable user customization, you can use the TabViewCustomization modifier. This allows users to reorder tabs and hide infrequently used options.

• Sidebar Adaptable: You can make your tab view more flexible by applying the new sidebar adaptable tab view style. This allows switching between a tab bar and a sidebar view.

For more detailed information, you can refer to the session Elevate your tab and sidebar experience in iPadOS at the timestamp 04:28.

Relevant Sessions

• Elevate your tab and sidebar experience in iPadOS
• What’s new in SwiftUI

These sessions provide comprehensive insights into the new tab bar features and how to implement them using SwiftUI.