How to present modal in SwiftUI automatically without button - swift

Question

I am thinking of using a switch case to present different views.
struct searchview : View {
var body: some View {
VStack {
VStack {
if self.speechRecognition.isPlaying == true {
VStack {
Text(self.speechRecognition.recognizedText).bold()
.foregroundColor(.white)
.frame(minWidth: 0, maxWidth: .infinity, minHeight: 0, maxHeight: .infinity, alignment: .center)
.font(.system(size: 50))
.sheet(isPresented: $showSheet) {
self.sheetView
}
}.onAppear {
DispatchQueue.main.asyncAfter(deadline: .now() + 2) {
self.showSheet = true
}
}
}
}.onAppear(perform: getViews)
}
var currentSheetView: String {
var isProductDictEmpty = Global.productDict.isEmpty
var wasTextRecognizedEmpty = self.speechRecognition.recognizedText.isEmpty
var checkTextandDict = (wasTextRecognizedEmpty,isProductDictEmpty)
switch checkTextandDict {
case (true,true):
print("Product dict and Text rec are empty")
return "error"
case (false,false):
print("Yes we are in business")
return "product"
case (true,false):
print("OOPS we didnt catch that")
return "error"
case (false,true):
print("OOPS we didnt catch that")
return "zero match"
}
}
#ViewBuilder
var sheetView: some View {
if currentSheetView == "product" {
ProductSearchView(model: self.searchModel)
}
else if currentSheetView == "zero match" {
zeroResult()
}
else if currentSheetView == "error" {
SearchErrorView()
}
}
}
}
I know how to use .sheet modifier to present modal when a button is pressed but how could I the present the respective modals in swift cases automatically with button?
UPDATE
these are the views I am trying to implement
struct SearchErrorView: View {
var body: some View {
VStack {
Text("Error!")
Text("Oops we didn't catch that")
}
}
}
struct zeroResult: View {
var body: some View {
Text("Sorry we did not find any result for this item")
}
}
I'm not sure what I am doing wrongly. I tried to implement the solution below but still not able to call the views with the switch cases.

Answer 1

The solution is to programmatically set a variable controlling displaying of your sheet.
You can try the following to present your sheet in onAppear:
struct ContentView: View {
#State var showSheet = false
var body: some View {
Text("Main view")
.sheet(isPresented: $showSheet) {
self.sheetView
}
.onAppear {
self.showSheet = true
}
}
var currentSheetView: String {
"view1" // or any other...
}
#ViewBuilder
var sheetView: some View {
if currentSheetView == "view1" {
Text("View 1")
} else {
Text("View 2")
}
}
}
You may delay it as well:
.onAppear {
DispatchQueue.main.asyncAfter(deadline: .now() + 2) {
self.showSheet = true
}
}
Just setting self.showSheet = true will present the sheet. It's up to you how you want to trigger it.