在按下按钮时显示新的SwiftUI视图

import SwiftUI

struct ContentView: View {
    @State private var showNewView = false
    
    var body: some View {
        VStack {
            if showNewView {
                Text("新的视图")
            } else {
                Button(action: {
                    showNewView = true
                }) {
                    Text("显示新的视图")
                }
            }
        }
    }
}

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