Swiftui Navigationview Not See Image

SwiftUI NavigationView not see Image

This looks like SwiftUI bug of handling raster images. Please find below approach for workaround. Tested with Xcode 11.4 / iOS 13.4

This is an example of cell to be used for your goal. Of course in real case the image name and navigation link destination, etc., can be injected via constructor parameters for reuse purpose.

struct TestImageCell: View {
    @State private var isActive = false

    var body: some View {
        Image("large_image")    // raster !! image
            .resizable()
            .aspectRatio(contentMode: .fill)
            .frame(width: 370, height: 200)
            .cornerRadius(20.0)
            .overlay(
                Text("Press on me")              // text is over
                    .foregroundColor(.white)
                    .font(.largeTitle)
            )
            .onTapGesture { self.isActive.toggle() } // activate link on image tap
            .background(NavigationLink(destination:  // link in background
                Text("Detail view here"), isActive: $isActive) { EmptyView() })
    }
}

SwiftUI : Using NavigationView leads to image and text gone

There is usually only one NavigationView in an app. It is usually the outer most View.

In this case put it above the VStack in the ContentView.

One of the most common exceptions are sheets.

Navigation View not working properly in SwiftUI on iPad

As I commented there should be only one NavigationView, so here fixed ProductDetailView with removed redundant NavigationView.

Tested with Xcode 12

struct ProductDetailView: View {
    
    var product: Product
    var products: [Product] = productData
    
    @State var showingPreview = false
    
    var body: some View {
            ScrollView(.vertical, showsIndicators: false) {
                 VStack(alignment: .center, spacing: 20) {

                      ProductHeaderView(product: product)

                      VStack(alignment: .leading, spacing: 15) {

                            Text(product.title)
                                 .font(.largeTitle)
                                 .fontWeight(.heavy)

                            Text(product.headline)
                                 .font(.headline)
                                 .multilineTextAlignment(.leading)

                            Text("Learn More About \(product.title)".uppercased())
                                 .fontWeight(.bold)
                                 .padding(0)

                            Text(product.description)
                                 .multilineTextAlignment(.leading)
                                 .padding(.bottom, 10)

                      }
                      .padding(.horizontal, 20)
                      .frame(maxWidth: 640, alignment: .center)
                 }
                 .navigationBarTitle(product.title, displayMode: .inline)
                 .navigationBarHidden(true)
            }
            .edgesIgnoringSafeArea(.top)
    }
}

SwiftUI NavigationView Not Fully Extending In View

This is due to hack with appearance...

init() {
//    UITabBar.appearance().isTranslucent = false   // remove this line !!!
    UITabBar.appearance().barTintColor = UIColor(Color.pacificBlue)
}

Alternate: replace entire appearance with configured opaque background

init() {

    let newAppearance = UITabBarAppearance()
    newAppearance.configureWithOpaqueBackground()
    newAppearance.backgroundColor = UIColor(Color.pacificBlue)
    UITabBar.appearance().standardAppearance = newAppearance

}

Display system back button on SwiftUI NavigationView with no previous NavigationLink

You may try the following:

private var backButton: some View {
    Button(action: {}) {
        Image(systemName: "chevron.left")
            .scaleEffect(0.83)
            .font(Font.title.weight(.medium))
    }
}

Optionally you can apply .offset as well, but this may not adapt properly for larger accessibility font sizes:

.offset(x: -7, y: 0)

How do I navigate to my SecondView by tapping image button?

When you want to navigate, you simply use NavigationLink without a Button:

NavigationLink(destination: SecondView(), label: {
    Image("radio-on-button")
        .renderingMode(.original)
        .resizable()
        .frame(width: 75, height: 75)
        .foregroundColor(.red)
        .padding(.horizontal)
})

Button is used to execute some action.

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