Swiftui:如何在导航标题上添加辅助功能标识符 [英] Swiftui: How to add Accessibility Identifier on navigationTitle

问题描述

我们如何将 Accessibility Identifier 添加到 NaviagationTitle 文本.我知道对于按钮/文本/图像/堆栈视图，我们可以使用 .accessibility(identifier: some_identifier").

How can we add the Accessibility Identifier to NaviagationTitle Text. I know for buttons/text/Image/stack views we can use .accessibility(identifier: "some_identifier").

struct SomeView: View {
  var body: some View {
    VStack {
         Text("Title Text")
           .accessibility(identifier: "title")
           }
           .navigationTitle("title") //How to add accessibilityIdentifier to Navigation bar title?
           //.navigationTitle(Text("title").accessibility(identifier: "title"))
       }
   }

无法将修饰符添加到 .navigationBarTitle(Text(title"), displayMode: .inline).XCUI 自动化测试需要辅助功能标识符.

unable to add the modifier to .navigationBarTitle(Text("title"), displayMode: .inline). Accessibility Identifiers are required for XCUI automation testing.

推荐答案

我认为这在 SwiftUI 中使用 .accessibility(identifier:) 是不可能的 - 可能值得向 Apple 提交反馈.

I don't think this is possible in SwiftUI using .accessibility(identifier:) - it might be worth submitting feedback to Apple.

但是，您仍然可以通过其标识符访问导航栏 - 只是默认标识符是文本:

However, you can still access the navigation bar by its identifier - just the default identifier is the text:

.navigationTitle("title")

let app = XCUIApplication()
app.launch()
assert(app.navigationBars["title"].exists) // true

---

或者，您可以尝试使用辅助扩展(改编自 此处)访问 UINavigationBar):

struct NavigationBarAccessor: UIViewControllerRepresentable {
    var callback: (UINavigationBar?) -> Void
    private let proxyController = ViewController()

    func makeUIViewController(context: UIViewControllerRepresentableContext<NavigationBarAccessor>) -> UIViewController {
        proxyController.callback = callback
        return proxyController
    }

    func updateUIViewController(_ uiViewController: UIViewController, context: UIViewControllerRepresentableContext<NavigationBarAccessor>) {}

    typealias UIViewControllerType = UIViewController

    private class ViewController: UIViewController {
        var callback: (UINavigationBar?) -> Void = { _ in }

        override func viewWillAppear(_ animated: Bool) {
            super.viewWillAppear(animated)
            callback(navigationController?.navigationBar)
        }
    }
}

现在您可以从 SwiftUI 视图访问 UINavigationBar:

Now you can access UINavigationBar from a SwiftUI view:

struct ContentView: View {
    var body: some View {
        NavigationView {
            Text("text")
                .navigationTitle("title")
                .background(
                    NavigationBarAccessor {
                        $0?.accessibilityIdentifier = "id123"
                    }
                )
        }
    }
}

请注意，在上面的示例中，您将 accessibilityIdentifier 设置为 UINavigationBar 本身，而不是直接设置为标题.

Note that in the above example you set accessibilityIdentifier to the UINavigationBar itself and not to the title directly.

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