config 2 alerts messages in button swiftUI - swift

Question

I going learn swift and swiftUI.
I make application for organize notes by category. you can find my project in my GitHub if you need. https://github.com/yoan8306/List-Notes
I have problem. I think it's simple. I would like make 2 alerts messages. The first it's when save is success and the second is when they are problem like one field is empty or category is empty.
private func checkNoteIsOk() -> Bool{
if !noteTitleField.isEmpty && !noteField.isEmpty && categorySelected != nil {
return true
} else {
return false
}
}
.
Button(action: {
guard checkNoteIsOk() else {
presentAlert = true
return
}
coreDM.saveNote(noteData: noteField, noteTitle: noteTitleField,
noteDate: Date(), noteCategory: categorySelected!)
emptyField()
saveSuccess = true
},
label: {
Text("Save")
}
)
}
//end Vstak
.navigationTitle("Create new note")
.alert(isPresented: $presentAlert) {
Alert(title: Text("Error !"), message: Text("Not saved"),
dismissButton: .default(Text("OK"))) }
.alert(isPresented: $saveSuccess) {
Alert(title: Text("Success !"), message: Text("Insert with success !"),
dismissButton: .default(Text("OK"))) }
I think it's because they are two alerts messages. And only the last message alert can display. Thank you for your answer and your help.

Answer 1

For multiple alerts in a single view, you can use an enum.
First, you need to create an enum like this and define all the alert message
enum AlertType: Identifiable {
var id: UUID {
return UUID()
}
case success
case error
var title: String {
switch self {
case .success:
return "Success !"
case .error:
return "Error !"
}
}
var message: String {
switch self {
case .success:
return "Insert with success !"
case .error:
return "This category already exist !!"
}
}
}
now create one state var in the view.
struct NewCategoryView: View {
#State private var alertType: AlertType?
// Other code
}
and add the alert at the end
//end Vstak
.navigationTitle("New Category")
.onAppear(perform: { updateCategoryList()} )
.alert(item: self.$alertType, content: { (type) -> Alert in
Alert(title: Text(type.title), message: Text(type.message),
dismissButton: .default(Text("OK")))
})
now show the alert by assigning the value. Like this
if condition_true {
alertType = AlertType.success //<-- Here
} else {
alertType = AlertType.error //<-- Here
}

Answer 2

While [Raja]'s answer is working. I don't think it is ideal because
it generates random UUID's which Apple discourages when it's not needed.
it does requires multiple switch statements where only one is needed.
A more simple solution might be to define the enum like this
enum ResultAlert: Int8, Identifiable {
case success, error
var id: some Hashable { rawValue }
var content: Alert {
switch self {
case .success: return Alert(title: Text("Success!"))
case .error: return Alert(title: Text("Oy, error..."))
}
}
}
Then the rest is the same as Raja's answer:
Add it as a #State variable to your view
#State var resultAlert: ResultAlert?
Activate it using resultAlert = .success or resultAlert = .error. Deactivate it using resultAlert = .none
And present it like this:
.alert(item: $resultAlert, content: \.content)