error preventing me from building my project that is ambiguous - ios

Question

I am getting this error in my SwiftUI file. I have tried compiling in Swift 5.3, and 5.4 beta, but I keep getting the same error. This file contains custom views that come from an in-house framework created by me. This framework works fine on other projects, so I have eliminated this being the issue. I have many if statements creating the views based on user selection. The code worked before, but it randomly started stating this error.
import SwiftUI
struct Cheatsheet: View {
var Letters = ["A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z","Number 1","Number 2","Number 3","Number 4","Number 5","Number 6","Number 7","Number 8","Number 9","Number 0","Number Sign"]
#State private var selection = 0
var body: some View {
VStack {
//Logic
if selection == 0 {
NavigationView {
NavigationLink(destination: LetterA()) { LetterA()
}
}
}
if selection == 1 {
NavigationView {
NavigationLink(destination: LetterB()) { LetterB()
}
}
}
if selection == 2 {
NavigationView {
NavigationLink(destination: LetterC()) { LetterC()
}
}
}
if selection == 3 {
NavigationView {
NavigationLink(destination: LetterD()) { LetterD()
}
}
}
if selection == 4 {
NavigationView {
NavigationLink(destination: LetterE()) { LetterE()
}
}
}
if selection == 5 {
NavigationView {
NavigationLink(destination: LetterF()) { LetterF()
}
}
}
if selection == 6 {
NavigationView {
NavigationLink(destination: LetterG()) { LetterG()
}
}
}
if selection == 7 {
NavigationView {
NavigationLink(destination: LetterH()) { LetterH()
}
}
}
if selection == 8 {
NavigationView {
NavigationLink(destination: LetterI()) { LetterI()
}
}
}
if selection == 9 {
NavigationView {
NavigationLink(destination: LetterJ()) { LetterJ()
}
}
}
if selection == 10 {
NavigationView {
NavigationLink(destination: LetterK()) { LetterK()
}
}
}
if selection == 11 {
NavigationView {
NavigationLink(destination: LetterL()) { LetterL()
}
}
}
if selection == 12 {
NavigationView {
NavigationLink(destination: LetterM()) { LetterM()
}
}
}
if selection == 13 {
NavigationView {
NavigationLink(destination: LetterN()) { LetterN()
}
}
}
if selection == 14 {
NavigationView {
NavigationLink(destination: LetterO()) { LetterO()
}
}
}
if selection == 15 {
NavigationView {
NavigationLink(destination: LetterP()) { LetterP()
}
}
}
if selection == 16 {
NavigationView {
NavigationLink(destination: LetterQ()) { LetterQ()
}
}
}
if selection == 17 {
NavigationView {
NavigationLink(destination: LetterR()) { LetterR()
}
}
}
if selection == 18 {
NavigationView {
NavigationLink(destination: LetterS()) { LetterS()
}
}
}
if selection == 19 {
NavigationView {
NavigationLink(destination: LetterT()) { LetterT()
}
}
}
if selection == 20 {
NavigationView {
NavigationLink(destination: LetterU()) { LetterU()
}
}
}
if selection == 21 {
NavigationView {
NavigationLink(destination: LetterV()) { LetterV()
}
}
}
if selection == 22 {
NavigationView {
NavigationLink(destination: LetterW()) { LetterW()
}
}
}
if selection == 23 {
NavigationView {
NavigationLink(destination: LetterX()) { LetterX()
}
}
}
if selection == 24 {
NavigationView {
NavigationLink(destination: LetterY()) { LetterY()
}
}
}
if selection == 25 {
NavigationView {
NavigationLink(destination: LetterZ()) { LetterZ()
}
}
}
//END -> Logic
Picker(selection: $selection, label: Text("")) {
ForEach(0 ..< Letters.count) {
Text(Letters[$0])
}
}
}
}
}
struct Cheatsheet_Previews: PreviewProvider {
static var previews: some View {
Cheatsheet()
}
}

Answer 1

It is possible to have not more than 10 views in one container, so group them by 10th, like
Group {
if selection == 0 {
NavigationView {
NavigationLink(destination: LetterA()) { LetterA()
}
}
}
if selection == 1 {
NavigationView {
NavigationLink(destination: LetterB()) { LetterB()
}
}
}
...
if selection == 9 {
NavigationView {
NavigationLink(destination: LetterJ()) { LetterJ()
}
}
}
}
Group {
if selection == 10 {
NavigationView {
NavigationLink(destination: LetterK()) { LetterK()
}
}
}
...
}
or, better, rethink the design to use ForEach view builder.

Answer 2

Problem is here
Picker(selection: $selection, label: Text("")) {
ForEach(0 ..< Letters.count) {
Text(Letters[$0])
}
}
you need self with Letters so it should be
Picker(selection: $selection, label: Text("")) {
ForEach(0 ..< Letters.count) {
Text(self.Letters[$0])
}
}
And second problem is the amount of views added in 1 group, you can't have more than 10 views per 1 group. You would be better off just making a function that takes care of the switching. and its cleaner.
Here is an example
struct Test: View {
var Letters = ["A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z","Number 1","Number 2","Number 3","Number 4","Number 5","Number 6","Number 7","Number 8","Number 9","Number 0","Number Sign"]
#State private var selection = 0
var body: some View {
VStack {
// Logic
getLetterView(selection: self.selection)
//END -> Logic
Picker(selection: $selection, label: Text("")) {
ForEach(0 ..< Letters.count) {
Text(self.Letters[$0])
}
}
}
}
}
func getLetterView(selection: Int) -> AnyView? {
var destination: AnyView? = nil
if selection == 0 {
destination = AnyView(LetterA())
} else if(selection == 1) {
destination = AnyView(LetterB())
} else if(selection == 2) {
destination = AnyView(LetterC())
} else if(selection == 3) {
destination = AnyView(LetterD())
} else if(selection == 4) {
destination = AnyView(LetterE())
} else if(selection == 5) {
destination = AnyView(LetterF())
} else if(selection == 6) {
destination = AnyView(LetterG())
} else if(selection == 7) {
destination = AnyView(LetterH())
} else if(selection == 8) {
destination = AnyView(LetterI())
} else if(selection == 9) {
destination = AnyView(LetterJ())
}
// Rest of your if conditions
return AnyView(NavigationView {
NavigationLink(destination: destination) {
destination
}
})
}