ios - Swiftui - UIHostingController 添加不需要的导航栏

Question

我正在尝试将 SwiftUI 集成到我的项目中，我目前正在使用一个 Storyboard，该 Storyboard是通过我的应用委托(delegate)使用以下代码启动的:

_rootNavigiationController = [[UINavigationController alloc] init];
_rootNavigiationController.navigationBarHidden = YES;

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:StoryboardLoginRegister bundle:nil];
BasicInformation *basicInfo = (BasicInformation *)[storyboard instantiateViewControllerWithIdentifier:@"basic-info"];
[self.rootNavigiationController setViewControllers:@[basicInfo]];

所以基本上我的 App delegate 在 objective-c 中，windows 根 Controller 是一个 UINavigation Controller 。

我的 BasicInformation 类如下所示:

class BasicInfo: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        self.navigationController?.isNavigationBarHidden = true;
        // Do any additional setup after loading the view.
    }
    
    @IBSegueAction func addSwiftUi(_ coder: NSCoder) -> UIViewController? {
        let BasicInfoUI = BasicInfo_UI();
        let hostingController = UIHostingController(coder: coder, rootView: BasicInfoUI);
        hostingController?.navigationController?.isNavigationBarHidden = true;
        return hostingController;
    }
    
    /*
    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        // Get the new view controller using segue.destination.
        // Pass the selected object to the new view controller.
    }
    */

}

基本信息的 Swift UI 如下:

struct BasicInfo_UI: View {
    @State var username: String = ""
    @State var isPrivate: Bool = true
    @State var notificationsEnabled: Bool = false
    @State private var previewIndex = 0
    var previewOptions = ["Always", "When Unlocked", "Never"]

    var body: some View {
        Form {
            Section(header: Text("PROFILE")) {
                TextField("Username", text: $username)
                Toggle(isOn: $isPrivate) {
                    Text("Private Account")
                }
            }
            
            Section(header: Text("NOTIFICATIONS")) {
                Toggle(isOn: $notificationsEnabled) {
                    Text("Enabled")
                }
                Picker(selection: $previewIndex, label: Text("Show Previews")) {
                    ForEach(0 ..< previewOptions.count) {
                        Text(self.previewOptions[$0])
                    }
                }
            }
            
            Section(header: Text("ABOUT")) {
                HStack {
                    Text("Version")
                    Spacer()
                    Text("2.2.1")
                }
            }
            
            Section {
                Button(action: {
                    print("Perform an action here...")
                }) {
                    Text("Reset All Settings")
                }
            }
        }
    }
}

struct BasicInfo_UI_Previews: PreviewProvider {
    static var previews: some View {
        BasicInfo_UI()
    }
}

我唯一的问题是我似乎无法弄清楚为什么我的应用程序的 UI 顶部有一个导航栏

希望有人能向我解释为什么我的 Controller 事件顶部确实有一个导航栏，尽管我已经在我的应用程序的多个位置明确地将 navigationbarhidden 设置为 true

Answer 1

尝试通过 SwiftUI 显式隐藏导航栏，例如

Form {

  // ... other code

}
.navigationBarTitle("")
.navigationBarHidden(true)