How can I focus on the second tab in SwiftUI's TabView?

To focus on the second tab in SwiftUI's `TabView`, you can use a combination of a `@State` variable and the `selection` parameter of the `TabView`. Here's how you can achieve this:

1. Declare a State Variable:

- Create a `@State` variable to keep track of the currently selected tab. This variable will be used to control which tab is active.

2. Use the `selection` Parameter:

- Pass the `@State` variable to the `selection` parameter of the `TabView`. This allows you to programmatically change the selected tab.

3. Set the Initial Selection:

- To focus on the second tab initially, set the `@State` variable to the index of the second tab (which is typically `1`, since indices are zero-based).

4. Example Code:

import SwiftUI

struct ContentView: View {
  @State private var selectedTab = 1 // Focus on the second tab (index 1)

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

      Text("Second Tab")
        .tabItem {
          Label("Tab 2", systemImage: "2.circle")
      }
      .tag(1)

      Text("Third Tab")
        .tabItem {
          Label("Tab 3", systemImage: "3.circle")
      }
      .tag(2)
    }
  }
}

5. Explanation:

- The `@State private var selectedTab = 1` line declares a state variable named `selectedTab` and initializes it to `1`, which corresponds to the second tab.

- The `TabView(selection: $selectedTab)` line binds the `selectedTab` variable to the `TabView`, allowing the `TabView` to update its selection based on the value of `selectedTab`.

- Each tab is given a `.tag()` modifier with a unique integer value. This tag is used to identify which tab is selected.

By setting `selectedTab` to `1` initially, the second tab will be focused when the view appears. You can change the value of `selectedTab` programmatically to switch between tabs.

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