onAppear and onDisappear don't work.
However, this customized function did work!
extension View {
func onDidAppear(_ perform: @escaping (() -> Void)) -> some View {
self.modifier(ViewDidAppearModifier(callback: perform))
}
}
struct ViewDidAppearModifier: ViewModifier {
let callback: () -> Void
func body(content: Content) -> some View {
content
.background(ViewDidAppearHandler(onDidAppear: callback))
}
}
struct ViewDidAppearHandler: UIViewControllerRepresentable {
func makeCoordinator() -> ViewDidAppearHandler.Coordinator {
Coordinator(onDidAppear: onDidAppear)
}
let onDidAppear: () -> Void
func makeUIViewController(context: UIViewControllerRepresentableContext<ViewDidAppearHandler>) -> UIViewController {
context.coordinator
}
func updateUIViewController(_ uiViewController: UIViewController, context: UIViewControllerRepresentableContext<ViewDidAppearHandler>) {
}
typealias UIViewControllerType = UIViewController
class Coordinator: UIViewController {
let onDidAppear: () -> Void
init(onDidAppear: @escaping () -> Void) {
self.onDidAppear = onDidAppear
super.init(nibName: nil, bundle: nil)
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
onDidAppear()
}
}
}
Anishishi
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東京都