SwiftUI: Reinitialize after popover.show - swift

Question

I am writing a MacOS (10.15 Catalina) application using a popover. The main ContentView includes a custom view with a simple toggle:
class AppDelegate: NSObject, NSApplicationDelegate {
var popover=NSPopover()
func applicationDidFinishLaunching(_ aNotification: Notification) {
self.popover.contentViewController = NSHostingController(rootView: contentView)
self.statusBarItem = NSStatusBar.system.statusItem(withLength: 18)
if let statusBarButton = self.statusBarItem.button {
statusBarButton.title = "☰"
statusBarButton.action = #selector(togglePopover(_:))
}
func show() {
let statusBarButton=self.statusBarItem.button!
self.popover.show(relativeTo: statusBarButton.bounds, of: statusBarButton, preferredEdge: NSRectEdge.maxY)
}
func hide() {
popover.performClose(nil)
}
#objc func togglePopover(_ sender: AnyObject?) {
self.popover.isShown ? hide() : show()
}
}
struct ContentView: View {
var body: some View {
Test("Hello")
// more stuff
}
}
struct Test: View {
var message: String
#State private var clicked: Bool = false
init(message: String) {
self.message = message
_clicked = State(initialValue: false)
print("init")
}
var body: some View {
return HStack {
Text(message)
Button("Click") {
self.clicked = true
}
if !self.clicked {
Text("Before")
}
else {
Text("After")
}
}
}
}
I would like to reinitialize some data in custom view whenever the popup reappears. So, in this example, clicked should reset to false. I have tried every combination of #Binding and #State variables I could find in my many searches, but nothing appears to work. It appears that .onAppear() only fires the first time.
The init() function is there because in my application I also need to include additional content and code. In this example, I have tried to use it to initialize the clicked state variable, but, though the print() function does print, the variable doesn’t seem to get reset.
How can I reinitialize the #State variable?

Answer 1

To initialize state in init you should not initialize it as property (because properties are initialised before init and state is initialised only once), so
struct Test: View {
var message: String
#State private var clicked: Bool // << here, only declare
init(message: String) {
self.message = message
_clicked = State(initialValue: false) // << then this works
print("init")
}
// ... other code
}