在 SwiftUI 中隐藏导航控制器的底线

Question

如何使用 SwiftUI 隐藏

UINavigationController

上的底部栏？到目前为止，我只找到了 UIKit 的解决方案，但没有找到 SwiftUI 的解决方案。

Answer 1

查看已接受的答案：SwiftUI 删除导航栏底部边框

之前： 之后：

import SwiftUI
struct TestView: View {
    init(){
        let appearance = UINavigationBarAppearance()
            appearance.shadowColor = .clear
            UINavigationBar.appearance().standardAppearance = appearance
            UINavigationBar.appearance().scrollEdgeAppearance = appearance
    }
    var body: some View {
        NavigationView{
            ScrollView{
                ForEach(0 ..< 20){ num in
                        Text("Num - \(num)")
                        .padding()
                }
            }
            .navigationTitle("Learn")
        }
    }
}

struct TestView_Previews: PreviewProvider {
    static var previews: some View {
        TestView()
    }
}

Answer 2

我在使用 UIHostingController 时遇到了同样的问题。所以我最终将一个子 UIHostingController 添加到 UIViewController 并以这种方式设置阴影。

@IBOutlet weak var theContainer: UIView!

override func viewDidLoad() {
 super.viewDidLoad()

  let appearance = UINavigationBarAppearance()
  appearance.backgroundColor = UIColor(Color("navbackground"))
  appearance.shadowColor = .clear
  self.navigationController?.navigationBar.scrollEdgeAppearance = appearance
  self.navigationController?.navigationBar.standardAppearance = appearance

  let childView = UIHostingController(rootView: SettingsView())
  addChild(childView)

  childView.view.frame = theContainer.bounds
  theContainer.addSubview(childView.view)
  childView.didMove(toParent: self)
}

Answer 3

这是 SwiftUI 中隐藏导航栏中底部分隔线的完整工作代码：

let coloredAppearance = UINavigationBarAppearance() 
coloredAppearance.configureWithOpaqueBackground() 
coloredAppearance.backgroundColor = UIColor(Color.green) 
coloredAppearance.titleTextAttributes = [.foregroundColor: UIColor(.white)] 
coloredAppearance.largeTitleTextAttributes = [ .foregroundColor: UIColor(.white), .font: UIFont.systemFont(ofSize: 18) ] 

coloredAppearance.shadowColor = .clear
coloredAppearance.shadowImage = UIImage() 

UINavigationBar.appearance().standardAppearance = coloredAppearance 
UINavigationBar.appearance().compactAppearance = coloredAppearance
UINavigationBar.appearance().scrollEdgeAppearance = coloredAppearance