AnyView not re-rendering after state change - swift

Question

I have the func below that returns AnyView and should give different results based on device orientation. When the orientation is changed, it is detected and printed, but the view is not re-rendered. Any idea how to fix this?
func getView() -> AnyView {
#State var isPortrait = UIDevice.current.orientation.isPortrait
let a =
HStack {
if isPortrait {
VStack {
Text("text inside VStack")
}
} else {
HStack {
Text("text inside HStack")
}
}
}
.onReceive(NotificationCenter.default.publisher(for: UIDevice.orientationDidChangeNotification)) { _ in
print("notification isPortrait: \(UIDevice.current.orientation.isPortrait)")
isPortrait = UIDevice.current.orientation.isPortrait
}
.onAppear() {
isPortrait = UIDevice.current.orientation.isPortrait
}
return AnyView(a)
}

Answer 1

Here is my test code that shows the changing of orientations. Tested on ios 15, iPhone device.
import SwiftUI
#main
struct TestApp: App {
var body: some Scene {
WindowGroup {
ContentView()
}
}
}
struct ContentView: View {
#State var isPortrait = UIDevice.current.orientation.isPortrait // <--- here
var body: some View {
VStack (spacing: 40) {
Text("testing orientations")
// getView() // works just as well
myView // alternative without AnyView
}
}
var myView: some View {
Text(isPortrait ? "should be Portrait" : "should be Landscape")
.onReceive(NotificationCenter.default.publisher(for: UIDevice.orientationDidChangeNotification)) { _ in
isPortrait = UIDevice.current.orientation.isPortrait
}
.onAppear() {
isPortrait = UIDevice.current.orientation.isPortrait
}
}
func getView() -> AnyView {
let a =
HStack {
if isPortrait {
VStack {
Text("should be Portrait")
}
} else {
HStack {
Text("should be Landscape")
}
}
}
.onReceive(NotificationCenter.default.publisher(for: UIDevice.orientationDidChangeNotification)) { _ in
print("notification isPortrait: \(UIDevice.current.orientation.isPortrait)")
isPortrait = UIDevice.current.orientation.isPortrait
}
.onAppear() {
isPortrait = UIDevice.current.orientation.isPortrait
}
return AnyView(a)
}
}
EDIT1:
As mentioned by #Rob, the best way is to make a separate custom view, such as:
struct GetView: View {
#State var isPortrait = UIDevice.current.orientation.isPortrait
var body: some View {
VStack {
HStack {
if isPortrait {
VStack {
Text("should be Portrait")
}
} else {
HStack {
Text("should be Landscape")
}
}
}
.onReceive(NotificationCenter.default.publisher(for: UIDevice.orientationDidChangeNotification)) { _ in
print("notification isPortrait: \(UIDevice.current.orientation.isPortrait)")
isPortrait = UIDevice.current.orientation.isPortrait
}
.onAppear() {
isPortrait = UIDevice.current.orientation.isPortrait
}
}
}
}