How can set a range to the foreach-CodePudding

I wan to get the last 7 entries from the model mood. I just want the list contain not more than 7 entries and its is the last 7 of it. I tried for loop and foreach loop but still get an error.

if selectedTab == "LAST 7 ENTRIES"{
                    ForEach(self.entryController.moods, id: \.id )
                    {mood in
                        NavigationLink(destination: EntryDetailView(entryController: self.entryController, mood: mood)) {
                            HStack{
                                VStack {
                                    Text(mood.monthString)
                                        .font(.title2)
                                        .fontWeight(.bold)
                                        .foregroundColor(mood.emotion.moodColor)
                                    Text("\(mood.dayAsInt)")
                                        .font(.title2)
                                        .fontWeight(.bold)
                                        .foregroundColor(mood.emotion.moodColor)
                                }
                                RowView(mood: mood)
                            }
                        }
                    }.onDelete { (index) in
                        self.entryController.deleteMood(at: index)
                }
            }

This is my Entry Controller and the model

    @Published var moods: [Mood] = [];
    struct Mood: Codable, Equatable, Identifiable {
        var id = UUID()
        let emotion: Emotion
        var activity: String?
        var comment: String?
        let date: Date
        
        init(emotion: Emotion, activity: String?, comment: String?, date: Date) {
            self.emotion = emotion
            self.activity = activity
            self.comment = comment
            self.date = date
        }
    }

func loadFromPersistentStore() {
        
        // Plist -> Data -> Stars
        let fileManager = FileManager.default
        guard let url = persistentFileURL, fileManager.fileExists(atPath: url.path) else { return }
        
        do {
            let data = try Data(contentsOf: url)
            let decoder = PropertyListDecoder()
            moods = try decoder.decode([Mood].self, from: data)
        } catch {
            print("error loading stars data: \(error)")
        }
    }

CodePudding user response：

Here is an approach for you, your question does not contain needed codes to answer it, however in this example you can find a way for your issue:

struct ContentView: View {
    
    let array: [Int] = Array(1...28)
    
    var body: some View {

        ForEach(array.indices, id:\.self) { index in
            
            if ((array.count - 7) < array[index]) {

                Text("\(array[index])")
                    .padding()
            }
   
        }
   
    }
}

CodePudding user response：

you could try something like this:

if (entryController.moods.count >= 7) {
    ForEach((entryController.moods.endIndex-7)..<entryController.moods.endIndex, id: \.self) { ndx in
        let mood = entryController.moods[ndx]
        // ...
    }
}

Note, you will have to adjust the index in the .onDelete