Conditionally present ActionSheet SwiftUI - swiftui

Question

I created an update sheet to inform my users about updates, but I don't want it to display every time I push an update because sometimes it's just bug fixes, so I created a constant to toggle the sheet. I'm calling the sheet below:
VStack {
Text(" ")
}
.sheet(isPresented: $isShowingAppStoreUpdateNotification) {
UpdatesView()
}
How can I conditionally check for the constant? This is what I tried:
if(generalConstants.shouldShowUpdateSheet) {
.sheet(isPresented: $isShowingAppStoreUpdateNotification) {
UpdatesView()
}
}
But I get this error: Cannot infer contextual base in reference to member 'sheet'

Answer 1

.sheet is an instance method VStack, so you can't do what you did - it's not a legal Swift syntax.
The simplest approach is to have the condition over the VStack view:
if(generalConstants.shouldShowUpdateSheet) {
VStack {
Text(" ")
}
.sheet(isPresented: $isShowingAppStoreUpdateNotification) {
UpdatesView()
}
} else {
VStack {
Text(" ")
}
}
but, of course, this isn't very DRY.
Instead, keep the logic of how the view behaves in the view model / state, and let the View just react to data changes. What I mean is, only set isShowingAppStoreUpdateNotification to true when all the conditions that you want are satisfied, and keep the view as-is
#State var isShowingAppStoreUpdateNotification = generalConstants.shouldShowUpdateSheet
var body: some View {
VStack {
Text(" ")
}
.sheet(isPresented: $isShowingAppStoreUpdateNotification) {
UpdatesView()
}
}

Answer 2

Here is my sample code.
struct ContentView: View {
#State private var showSheet = false
#State private var toggle = false {
didSet {
self.showSheet = toggle && sheet
}
}
#State private var sheet = false {
didSet {
self.showSheet = toggle && sheet
}
}
var body: some View {
VStack {
Toggle(isOn: $toggle) {
Text("Allow to show sheet")
}
Button(action: {
self.sheet.toggle()
}) {
Text("Show sheet")
}
}.sheet(isPresented: $showSheet, content: {
Text("Sheet")
})
}
}