How can I give a swiftUI button multiple functions when pressed? - swift

Question

I created a page for users to register new accounts. I created a "continue" button that is meant to push the new data to firebase and simultaneously move the users to the next view which is my mapView(). Right now the signup fucntion is working, but I cant figure out how to implement the mapView()
Button(action:{
guard !email.isEmpty, !password.isEmpty else {
return
}
viewModel.signUp(email: email, password: password)
} , label: {
Text("Continue")
.foregroundColor(.white)
.frame(width: 350, height: 35)
.background(Color.blue)
.cornerRadius(20)
})
}
Ive tried adding map view inside of the function but Xcode returns a warning that says "Result of 'mapView' initializer is unused".
Button(action:{
guard !email.isEmpty, !password.isEmpty else {
return
}
viewModel.signUp(email: email, password: password)
mapView()
} , label: {
Text("Continue")
.foregroundColor(.white)
.frame(width: 350, height: 35)
.background(Color.blue)
.cornerRadius(20)
})

Answer 1

There are a few ways to pull this off, but using a NavigationStack works really well. Something like this:
//
// ContentView.swift
// animation-example
//
// Created by Andrew Carter on 12/15/22.
//
import SwiftUI
enum SignUpFlow {
case name
case age
case welcome
}
struct SignUpInfo {
var name: String
var age: String
}
struct NameView: View {
#Binding var name: String
var body: some View {
VStack {
TextField("Name", text: $name)
NavigationLink("Next", value: SignUpFlow.age)
.disabled(name.isEmpty)
}
}
}
struct AgeView: View {
#Binding var age: String
var body: some View {
VStack {
TextField("Age", text: $age)
NavigationLink("Next", value: SignUpFlow.welcome)
.disabled(age.isEmpty)
}
}
}
struct WelcomeView: View {
var body: some View {
Text("Welcome")
}
}
struct ContentView: View {
#State private var path: [SignUpFlow] = []
#State private var signUpInfo = SignUpInfo(name: "", age: "")
var body: some View {
NavigationStack(path: $path) {
NavigationLink("Create Account", value: SignUpFlow.name)
.navigationDestination(for: SignUpFlow.self) { flow in
switch flow {
case .age:
AgeView(age: $signUpInfo.age)
case .name:
NameView(name: $signUpInfo.name)
case .welcome:
WelcomeView()
}
}
}
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
In the example above with mapView() just placed in the buttons action, it's unused because, well, it's unused. The Button closure expects a Void return, you're just making a map view than instantly throwing it away- it's not used in any way.