.onAppear and .task code not running

Question

marcofusco111 OP

Created Mar ’25

Replies 6

Boosts 0

Participants 3

Hi,

I have the following code, which for some reason is not working as expected. I have an .onAppear and a .task function that isn't running, which I can see isn't running because nothing is printing. Any guidance would be greatly appreciated. Thank you.

struct ContentView: View {
    var body: some View {
        ZStack {
            switch view {
            case .view1: View1()
            case .view2: View2()
            case .view3: View3()            
            case .view4: View4()            
            case .view5: View5()
            default: SubscriptionStoreView(groupID: "")
            }
        }
            .onAppear() {
                view = .view6
                print("test 1")
            }
            .task {
                print("test")
                await refreshPurchasedProducts()
            }
    }
    
    func refreshPurchasedProducts() async {
        // Iterate through the user's purchased products.
        for await verificationResult in Transaction.currentEntitlements {
            switch verificationResult {
            case .verified(let transaction): print("verified")
            case .unverified(let unverifiedTransaction, let verificationError): print("unverified")
            default: print("default")
            }
        }
    }
}

Boost

Answer 1

darkpaw OP

Mar ’25

Where is view6 in your switch statement?

Where is view defined? I'd rename it to something else: "view" is too generic, and could be mistyped to "View".

Do View1() through View5() actually display anything?

Secondly, it's .onAppear {} not .onAppear() {}.

0

Answer 2

marcofusco111 OP

Mar ’25

Hi,

Thanks for your response. I changed the original View names to generic names for the purpose of this post. The view variable is defined in the ContentView struct like this:

@State var view: ScreenView

ScreenView is an enum with the different view names.

Only views 3 and 4 have code - the rest of the views/switch could be commented out.view6 is just the default view so there isn't a case for it in the switch statement. I changed .onAppear() to .onAppear. I don't see anything in the views that could possibly prevent those two functions from running.

0

Answer 3

marcofusco111 OP

Apr ’25

Just following up to see if anyone has any insight.

0

Answer 4

DTS Engineer OP

Apple

Apr ’25

Add a breakpoint to your code starting where you are calling ContentView in your Xcode project. Stepping through your code should help you figure out what is going on with your code. For more information, see Setting breakpoints to pause your running app. Also use _logChanges() to log causes of SwiftUI view updates.

0

Answer 5

marcofusco111 OP

Apr ’25

For some reason, the line with the print statement skips when stepping through code despite having a breakpoint:

var body: some View {
    Text("Test")
        .onAppear {
            print("test")
     }
}

0

Answer 6

DTS Engineer OP

Apple

Apr ’25

@marcofusco111 Take a look at Demystify SwiftUI.

0