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import SwiftUI | |
// MARK: - Extensions | |
extension EnvironmentObject { | |
fileprivate var hasValue: Bool { | |
Mirror(reflecting: self).children.contains { child in | |
guard child.label == "_store" else { return false } | |
return child.value is ViewRouter | |
} | |
} | |
} | |
// MARK: - Router | |
fileprivate class ViewRouter: ObservableObject, RoutingProxy { | |
@Published | |
var viewStack: [AnyView] = [] | |
init() {} | |
func route<T: View>(to view: T) { | |
self.viewStack.append(view.eraseToAnyView()) | |
self.objectWillChange.send() | |
} | |
func dismiss() { | |
_ = self.viewStack.popLast() | |
self.objectWillChange.send() | |
} | |
} | |
protocol RoutingProxy: AnyObject { | |
func route<T: View>(to view: T) | |
func dismiss() | |
} | |
// MARK: - View | |
struct RoutingView: View { | |
@ObservedObject | |
private var router: ViewRouter | |
init<Content: View>(@ViewBuilder content: (RoutingProxy) -> Content) { | |
self.router = ViewRouter() | |
router.route(to: content(router)) | |
} | |
init<Content: View>(@ViewBuilder content: () -> Content) { | |
self.router = ViewRouter() | |
router.route(to: content()) | |
} | |
var body: some View { | |
router.viewStack.last | |
.or(EmptyView().eraseToAnyView()) | |
.environmentObject(router) | |
} | |
} | |
// MARK: - Links | |
struct RoutingLink<Label: View, Destination: View>: View { | |
@EnvironmentObject | |
fileprivate var router: ViewRouter | |
var destination: Destination | |
var label: Label | |
init( | |
destination: Destination, | |
@ViewBuilder label: () -> Label | |
) { | |
self.destination = destination | |
self.label = label() | |
} | |
var body: Button<Label> { | |
Button(action: { | |
if self._router.hasValue { | |
self.router.route(to: self.destination) | |
} | |
}) { label } | |
} | |
} | |
struct DismissLink<Label: View>: View { | |
@EnvironmentObject | |
fileprivate var router: ViewRouter | |
var label: Label | |
init(@ViewBuilder label: () -> Label) { | |
self.label = label() | |
} | |
var body: Button<Label> { | |
Button(action: { | |
if self._router.hasValue { | |
self.router.dismiss() | |
} | |
}) { label } | |
} | |
} | |
struct DismissView<Content: View>: View { | |
@EnvironmentObject | |
fileprivate var router: ViewRouter | |
@Binding var isActive: Bool | |
var content: Content | |
var body: some View { | |
if !isActive { router.dismiss() } | |
return content | |
} | |
} |
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