116 lines
2.9 KiB
Swift
116 lines
2.9 KiB
Swift
//
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// NavigationRouter.swift
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// suixinkan
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//
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// Created by Codex on 2026/6/18.
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//
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import Observation
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import SwiftUI
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/// 应用内可导航目标，承载各 Tab 内部的路由目的地。
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enum AppRoute: Hashable {
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case placeholder(title: String)
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case home(HomeRoute)
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case profile(ProfileRoute)
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case orders(OrdersRoute)
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/// 返回该路由通过 NavigationStack push 后是否隐藏底部 TabBar。
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var hidesTabBarWhenPushed: Bool {
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true
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}
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/// 构建当前路由对应的目标页面。
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@ViewBuilder
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var destinationView: some View {
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switch self {
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case .placeholder(let title):
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PlaceholderDetailView(title: title)
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case .home(let route):
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route.destinationView
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case .profile(let route):
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route.destinationView
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case .orders(let route):
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route.destinationView
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}
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}
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}
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extension OrdersRoute {
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/// 构建订单模块二级路由对应的目标页面。
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@ViewBuilder
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var destinationView: some View {
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switch self {
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case .storeDetail(let item):
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StoreOrderDetailView(item: item)
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case .writeOffDetail(let item):
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WriteOffOrderDetailView(item: item)
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}
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}
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}
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@MainActor
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@Observable
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/// 单个 NavigationStack 的路径容器，用于保存某个 Tab 的导航历史。
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final class RouterPath {
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var path: [AppRoute] = []
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/// 将指定路由压入当前 Tab 的导航栈。
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func navigate(to route: AppRoute) {
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path.append(route)
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}
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/// 清空当前 Tab 的导航栈。
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func reset() {
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path = []
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}
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}
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@MainActor
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@Observable
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/// 主导航状态中心，管理当前 Tab 和每个 Tab 独立的 NavigationStack 路径。
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final class AppRouter {
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var selectedTab: AppTab = .home
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var selectedOrdersEntry: OrdersEntry = .storeOrders
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private var routers: [AppTab: RouterPath] = [:]
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/// 获取指定 Tab 对应的路由路径容器，不存在时自动创建。
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func router(for tab: AppTab) -> RouterPath {
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if let router = routers[tab] {
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return router
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}
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let router = RouterPath()
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routers[tab] = router
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return router
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}
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/// 生成 SwiftUI NavigationStack 可使用的路径绑定。
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func binding(for tab: AppTab) -> Binding<[AppRoute]> {
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let router = router(for: tab)
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return Binding(
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get: { router.path },
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set: { router.path = $0 }
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)
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}
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/// 切换到指定主 Tab。
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func select(_ tab: AppTab) {
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selectedTab = tab
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}
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/// 切换到订单 Tab，并指定订单内部子入口。
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func selectOrders(entry: OrdersEntry) {
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selectedOrdersEntry = entry
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selectedTab = .orders
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}
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/// 重置主 Tab 选择和所有 Tab 的导航历史。
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func reset() {
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selectedTab = .home
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selectedOrdersEntry = .storeOrders
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routers.values.forEach { $0.reset() }
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}
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}
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