SwiftUI中NavigationSplitView非根视图时NavigationLink跳转失效

成因 #

当NavigationRoutes作为子视图嵌入父级NavigationStack的导航链路中时，NavigationSplitView内部的NavigationLink会被父级NavigationStack拦截。系统默认会尝试将点击的目标视图压入父导航栈，而非触发当前NavigationSplitView的selection绑定来更新详情区域，最终导致详情视图无响应。

修复方案 #

方案一：改用点击手势直接更新选择状态 #

移除NavigationLink，用普通文本配合点击手势直接修改currentSelection，完全避开父级导航栈的干扰：

struct NavigationRoutes: View {
    @State private var currentSelection: Destinations?

    enum Destinations {
        case empty
        case first
        case second
    }

    var body: some View {
        NavigationSplitView {
            List(selection: $currentSelection) {
                Section {
                    Text("first view")
                        .onTapGesture {
                            currentSelection = .first
                        }
                }
                
                Section {
                    Text("second view")
                        .onTapGesture {
                            currentSelection = .second
                        }
                }
            }
        } detail: {
            switch currentSelection ?? .empty {
            case .empty:
                EmptyView()
            case .first:
                Text("First redirect")
            case .second:
                Text("Second redirect")
            }
        }
    }
}

方案二：给侧边栏添加独立导航栈 #

在NavigationSplitView的侧边栏（列表所在区域）包裹一个独立的NavigationStack，将其路径与currentSelection绑定，让内部的NavigationLink归属于这个局部导航栈，避免被父级拦截：

struct NavigationRoutes: View {
    @State private var currentSelection: Destinations?

    enum Destinations: Hashable {
        case empty
        case first
        case second
    }

    var body: some View {
        NavigationSplitView {
            NavigationStack(path: $currentSelection) {
                List(selection: $currentSelection) {
                    Section {
                        NavigationLink(value: Destinations.first) {
                            Text("first view")
                        }
                    }
                    
                    Section {
                        NavigationLink(value: Destinations.second) {
                            Text("second view")
                        }
                    }
                }
                .navigationDestination(for: Destinations.self) { _ in
                    EmptyView()
                }
            }
        } detail: {
            switch currentSelection ?? .empty {
            case .empty:
                EmptyView()
            case .first:
                Text("First redirect")
            case .second:
                Text("Second redirect")
            }
        }
    }
}

注：方案二中需要让Destinations枚举遵循Hashable协议，因为NavigationStack的路径类型要求遵循该协议。

内容的提问来源于stack exchange，提问作者kwiky