SwiftUI automatically scroll to bottom in ScrollView (Bottom first)

Question

My problem is that i have (in SwiftUI) a ScrollView with an foreach inside. Know when the foreach loads all of my entries i want that the last entry is focused.

I did some google research, but i didn't find any answer.

  ScrollView {
    VStack {
      ForEach (0..<self.entries.count) { index in
        Group {
          Text(self.entries[index].getName())
        }
      }
    }
  }

Answer 1

Solution for iOS14 with ScrollViewReader

in iOS14 SwiftUI gains a new ability. To be able to scroll in a ScrollView up to a particular item with a given id. There is a new type called ScrollViewReader which works just like Geometry Reader.

The code below will scroll to the last item in your View.

So this is your struct for 'Entry' I guess:

struct Entry {
    let id = UUID()
    
    func getName() -> String {
         return "Entry with id \(id.uuidString)"
    }
}

And the main ContentView:

struct ContentView: View {
    var entries: [Entry] = Array(repeating: Entry(), count: 10)

    var body: some View {
        ScrollView {
            ScrollViewReader { value in
                ForEach(entries, id: \.id) { entry in
                    Text(entry.getName())
                        .frame(width: 300, height: 200)
                        .padding(.all, 20)
                }
                .onAppear {
                    value.scrollTo(entries.last?.id, anchor: .center)
                }
            }
        }
    }
}

Try to run this in the new version of SwiftUI announced at WWDC20. I think it is a great enhancement.