SwiftUI TabbedView仅显示第一个选项卡的内容

import SwiftUI

struct ContentView: View {
    var body: some View {
        TabbedView {
            Text("Tab 1")
                .font(.largeTitle)
                .tabItem {
                    Image(systemName: "1.circle")
                    Text("Tab 1")
                }
            
            Text("Tab 2")
                .font(.largeTitle)
                .tabItem {
                    Image(systemName: "2.circle")
                    Text("Tab 2")
                }
            
            Text("Tab 3")
                .font(.largeTitle)
                .tabItem {
                    Image(systemName: "3.circle")
                    Text("Tab 3")
                }
        }
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}