New WebView (Xcode 26 beta) doesn't resize when NavigationSplitView sidebar appears

Question

retrograde OP

Created 1w

Replies 2

Boosts 0

Participants 1

I'm using the new Swifty WebView in 26.0 beta (17A5241e).

Previously, I would wrap WKWebView in a ViewRepresentable and place it in the detail area of a NavigationSplitView. The page content correctly shrunk when the sidebar was opened.

Now, the page content takes up the full width of the NavigationSplitView and the sidebar hovers over the page content with a translucent effect. This is in spite of setting .navigationSplitViewStyle(.balanced). Code below.

I believe this is a problem with the new WebView not respecting size hints from parent views in the hierarchy. This is because if I replace the WebView with a centered Text view, it shifts over correctly when the sidebar is opened.

struct OccludingNavSplitView: View {
    var body: some View {
        NavigationSplitView {
            Text("Sidebar")
        } detail: {
            WebView(url: URL(string: "https://www.google.com")!)
        }
        .navigationSplitViewStyle(.balanced)
    }
}

#Preview("Occluding sidebar") {
    OccludingNavSplitView()
}

Boost

Answer 1

retrograde OP

1w

Here is a screenshot of the WebView remaining in place after the sidebar opens on top of it.

Screenshot 2025-06-21 at 7.56.59 PM.png

0

Answer 2

retrograde OP

1w

Found a workaround by adding a Spacer to the left of the WebView. The Spacer seems to respond to the sidebar and push the WebView out from under the sidebar.

struct OccludingNavSplitView: View {
    var body: some View {
        NavigationSplitView {
            Text("Sidebar")
        } detail: {
          HStack {
            Spacer()
            WebView(url: URL(string: "https://www.google.com")!)
          }
        }
    }
}

This was hinted at in the description of ScrollView behavior underneath the sidebar in the docs here.

Interested in if this is working as intended or if there is some other configuration option needed.

0