SwiftUI App crashes while switching orientation

Question

SGA1710 OP

Created 4d

Replies 4

Boosts 0

Participants 3

Hi,

I am a new SwiftUI app developer and developing my first application. In the process of designing not very GUI rich app, I noticed my app crashed whenever I switched orientation (testing on multiple iPhone devices).

After going through all kind of logs and errors, performance enhancements nothing worked.

Then I started rolling back all GUI related features 1 by 1 and tested (I am sure there are better approaches, but excuse me I am novice in app development :) ). Even though it's time consuming, I could pin point the cause of the fatal error and app crash, it's due to multiple .shadow modifiers I used on NavigationLink inside a ForEach look (to be precise I used it like following, .shadow(radius: 15) .shadow(radius: 20) .shadow(radius: 20) .shadow(radius: 20) .shadow(radius: 20)

Note, there are only 7 items in List and it uses the Hero View (like app store's Today section) for child views.

Once I got rid of shadow modifies or used only 1 app works fine and doesn't crash.

Lesson learnt...

P.S. It's so ironic that so performance tuned devices couldn't handle this basic GUI stuff.

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Answer 1

Claude31 OP

3d

Welcome to the forum.

Could you post minimal code so that we can try to reproduce and try to understand ?

Maybe that's just an error in your code…

0

Answer 2

SGA1710 OP

3d

Here is the Home view...

struct HomeView: View {

@Namespace var namespace var homeWidgetConfigurations = LoadHomeWidgetConfigurations() @State private var scale: CGFloat = 1.0 @State private var offset: CGFloat = 0 @Environment(.colorScheme) private var deviceColorScheme

var body: some View {
    GeometryReader { geometry in
        VStack {
            NavigationStack {
                ScrollView {
                    Label("Home", systemImage: "house.fill")
                        .font(.title2)
                        .fontWeight(.bold)
                        .foregroundColor(deviceColorScheme == .light ? .black : .black)
                        .padding()
                        .background(
                            LinearGradient(gradient: Gradient(colors: [deviceColorScheme == .light ? .gray : .white, deviceColorScheme == .light ? .yellow : .yellow]), startPoint: .top, endPoint: .bottom)
                        )
                        .cornerRadius(10)
                    
                    Text("")
                    ForEach(homeWidgetConfigurations, id: \.id) { image in
                        NavigationLink(value: image) {
                            WidgetsView(widget: image)
                                .matchedTransitionSource(id: image.id, in: namespace, configuration: { source in
                                    source
                                        .background(Color.yellow)
                                        .clipShape(RoundedRectangle(cornerRadius: 20))
                                })
                        }
                        .clipShape(RoundedRectangle(cornerRadius: 10))
                        .shadow(radius: 10)
                        .shadow(radius: 15)
                        .shadow(radius: 20)
                        .shadow(radius: 20)
                        .shadow(radius: 20)
                        .shadow(radius: 20)
                        .shadow(radius: 20)
                        .padding(.horizontal, 7)
                    }
                }
                .navigationDestination(for: HomeViewWidgetItem.self) { item in
                    DismissableView {
                        if (item.title == "Entertainment"){
                            EntertainmentView()
                                .navigationTransition(.zoom(sourceID: item.id, in: namespace))
                        }
                        else if (item.title == "News"){
                            NewsHomeView()
                                .navigationTransition(.zoom(sourceID: item.id, in: namespace))
                        }
                        else{
                            Text ("In Dismissable View")
                        }
                    }
                }
            }
        } //end of VStack
    } //end of Geometry

}

0

Answer 3

darkpaw OP

2d

Why did you add so many .shadow modifiers? One is enough.

0

Answer 4

SGA1710 OP

2d

hmm... try it and you will know why I did what I did.

And. question is not that why I did, point is it breaks swiftUI app.

0