if Array is empty, append all values in enum to array - ios

Question

First Dabble in SwiftUI, I've managed to get the below code working such that when I press a button, it will show a "selected" state and add the selected sports into an array. (and remove from the array if "deselected")
However, I can't figure out how to initialise the sportsArray with ALL values within the enum HelperIntervalsIcu.icuActivityType.allCases if it is initially empty.
I tried to put in
if sportsArray.isEmpty {
HelperIntervalsIcu.icuActivityType.allCases.forEach {
sportsArray.append($0.rawvalue)
}
but Xcode keeps telling me type() cannot conform to View or things along those lines
struct selectSports: View {
#State private var sportsArray = [String]()
var body: some View {
ScrollView(.horizontal, showsIndicators: false) {
HStack {
// https://stackoverflow.com/a/69455949/14414215
ForEach(Array(HelperIntervalsIcu.icuActivityType.allCases), id:\.rawValue) { sport in
Button(action: {
addSports(sport: sport.rawValue)
}) {
HStack {
Image(getSportsIcon(sport: sport.rawValue))
.selectedSportsImageStyle(sportsArray: sportsArray, sport: sport.rawValue)
Text(sport.rawValue)
}
}
.buttonStyle(SelectedSportButtonStyle(sportsArray: sportsArray, sport: sport.rawValue))
}
}
}
}
struct SelectedSportButtonStyle: ButtonStyle {
var sportsArray: [String]
var sport: String
var selectedSport : Bool {
if sportsArray.contains(sport) {
return true
} else {
return false
}
}
func makeBody(configuration: Self.Configuration) -> some View {
configuration.label
.font(selectedSport ? Font.subheadline.bold() : Font.subheadline)
.aspectRatio(contentMode: .fit)
.foregroundColor(selectedSport ? Color.orange : Color(UIColor.label))
.padding([.leading, .trailing], 15)
.padding([.top, .bottom],10)
.overlay(
RoundedRectangle(cornerRadius: 5.0)
.stroke(lineWidth: 2.0)
.foregroundColor(selectedSport ? Color.orange : Color.gray)
)
.offset(x: 10, y: 0)
}
}
func addSports(sport: String) {
if sportsArray.contains(sport) {
let sportsIndex = sportsArray.firstIndex(where: { $0 == sport })
sportsArray.remove(at: sportsIndex!)
} else {
sportsArray.append(sport)
}
print("Selected Sports:\(sportsArray)")
}
}
No Sports Selected (in this case sportsArray is empty and thus the default state which I would like have would be to have ALL sports Pre-selected)
2 Sports Selected

Answer 1

I assume you wanted to do that in onAppear, like
struct selectSports: View {
#State private var sportsArray = [String]()
var body: some View {
ScrollView(.horizontal, showsIndicators: false) {
// .. other code
}
.onAppear {
if sportsArray.isEmpty { // << here !!
HelperIntervalsIcu.icuActivityType.allCases.forEach {
sportsArray.append($0.rawvalue)
}
}
}
}
}