CODEWITHSUNDEEP
iosswiftswiftui
Dale Humphries
Dale Humphries

Reputation: 91

Removing List Items on Completion When Leaving View

I have a small practice todo app I am building to learn SwiftUI, and I am able to create a list of tasks in CoreData and mark them as complete which sets isComplete to true and changes the image from an empty circle to a checkmark.

List {
    ForEach(taskItems, id: \.self) { item in
        HStack {
            if item.isComplete == true {
                Image(systemName: "checkmark.circle.fill").padding(5.0).foregroundColor(/*@START_MENU_TOKEN@*/.blue/*@END_MENU_TOKEN@*/).font(.system(size: 24))
                .onTapGesture {
                    item.isComplete.toggle()
                    self.saveTasks()
                }
            } else {
                Image(systemName: "circle").padding(5.0).foregroundColor(/*@START_MENU_TOKEN@*/.blue/*@END_MENU_TOKEN@*/).font(.system(size: 24))
                .onTapGesture {
                    item.isComplete.toggle()
                    self.saveTasks()
                }
            }
            Text("\(item.title)")
        }
        .padding(.vertical, 5.0)
    }
    .onDelete(perform: deleteTask)
}

However, I want these items to be removed from the list once the user has left the view (like the native iOS reminders app). I have a line of code in my fetch request that does remove the items from the list, but it removes them immediately.

@FetchRequest(
    entity: TaskItem.entity(),
    sortDescriptors: [NSSortDescriptor(keyPath: \TaskItem.order, ascending: false)]
    predicate: NSPredicate(format: "isComplete == %@", NSNumber(value: false))
) var taskItems: FetchedResults<TaskItem>

On tap of the item images, how can I mark the item as complete but only remove the list item once the user leaves the view or the app? Many thanks!

App UI

Upvotes: 2

Views: 214

Answers (1)

Reed
Reed

Reputation: 1002

on your highest parent view for example if your higher parent is Vstack then use

body {
VStack {
}
.onDisappear {
//perform removal of items
}
}
 

                   }

Upvotes: 1

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