ios - 如何仅更改一个 View 的 navigationTitle 颜色？

Question

我想将 View1 的 navigationTitle 的颜色更改为绿色，而不更改 View2 的 navigationTitle 的颜色。我看了this question并完全改变了颜色，但这并不是我所需要的。在 SwiftUI 中有没有办法只更改特定 View 的 navigationTitle 的颜色而不是整个 NavigationView？

这是我的代码:

struct View1: View {
    // copied from the question I mentioned above
    init() {
        let navbarAppearance = UINavigationBarAppearance()
        navbarAppearance.largeTitleTextAttributes = [.foregroundColor: UIColor.green]
        navbarAppearance.titleTextAttributes = [.foregroundColor: UIColor.green]
        navbarAppearance.configureWithTransparentBackground()
        UINavigationBar.appearance().standardAppearance = navbarAppearance
        UINavigationBar.appearance().compactAppearance = navbarAppearance
        UINavigationBar.appearance().scrollEdgeAppearance = navbarAppearance
    }

    var body: some View {
        NavigationView{
            NavigationLink(
                destination: View2())
            {
                Text("go to view 2")
            }
            .navigationTitle("View1")
        }
    }
}

struct View2: View {
    var body: some View {
        Text("view2")
            .navigationTitle("View2")
    }
}

感谢任何帮助，非常感谢!

Answer 1

这link可能会有帮助。有解决办法:

struct View1: View {
    var body: some View {
        NavigationView{
            ZStack {
                NavigationControllerAccessor(viewWillAppear: { nav in
                    nav.navigationBar.largeTitleTextAttributes = [
                        .foregroundColor: UIColor.green
                    ]
                }, viewWillDisappear: { nav in
                    nav.navigationBar.largeTitleTextAttributes = nil
                })
                
                NavigationLink(
                    destination: View2())
                {
                    Text("go to view 2")
                }
            }
            .navigationTitle("View1")
            
        }
        // This is important, it doesn't work without it.
        .navigationViewStyle(.stack)
    }
}

struct View2: View {
    var body: some View {
        Text("view2")
            .navigationTitle("View2")
    }
}

struct NavigationControllerAccessor: UIViewControllerRepresentable {
    var viewWillAppear: (UINavigationController) -> Void
    var viewWillDisappear: ((UINavigationController) -> Void)? = nil
    
    private let proxyController = ViewController()
    
    func makeUIViewController(context: UIViewControllerRepresentableContext<NavigationControllerAccessor>) -> UIViewController {
        proxyController.viewWillAppearCallback = viewWillAppear
        if let viewWillDisappear = viewWillDisappear {
            proxyController.viewWillDisappearCallback = viewWillDisappear
        }
        return proxyController
    }
    
    func updateUIViewController(_ uiViewController: UIViewController, context: UIViewControllerRepresentableContext<NavigationControllerAccessor>) {}
    
    private class ViewController: UIViewController {
        var viewWillAppearCallback: (UINavigationController) -> Void = { _ in }
        var viewWillDisappearCallback: (UINavigationController) -> Void = { _ in }
        
        override func viewWillAppear(_ animated: Bool) {
            super.viewWillAppear(animated)
            if let nav = navigationController {
                viewWillAppearCallback(nav)
            }
        }
        
        override func viewWillDisappear(_ animated: Bool) {
            super.viewWillDisappear(animated)
            if let nav = navigationController {
                viewWillDisappearCallback(nav)
            }
        }
    }
}