Why NavigationStack with NavigationPath calls navigationDestination multiple times on path append?

Question

The navigationDestination is being called a single time when using an array of type (ie: [String]) but multiple times when using NavigationPath after an append.

Check it with a breakpoint on Text(string) and switching the path types.

Tested with:

• iOS 16.1 - Xcode 14.0 & 14.1
• iOS 16.4.1 - Xcode 14.3
• iOS 16.5 - Xcode 14.3

Code:

import SwiftUI

struct ContentView: View {
    
    @State private var path = NavigationPath()
//    @State private var path = [String]()
    
    var body: some View {
        NavigationStack(path: $path) {
            VStack {
                Button("append") {
                    path.append("string")
                }
            }
            .navigationDestination(for: String.self) { string in
                Text(string) // <--- breakpoint here
            }
        }
    }
}

Answer 1

It's fixed!

Tested with beta 8 of Xcode 15 and iOS 17.