SwiftUI ScrollView weird vertical stretch

Question

I want to make extendable list in scrollview. I use top of the scrollview global location but when I extend section top location decreased and relocated.

Example Code :

ScrollView{
            VStack{

                GeometryReader{ reader -> AnyView in
                    print("\(reader.frame(in: .global).minY)")
                    return AnyView(Text("\(reader.frame(in: .global).minY)").onTapGesture {
                        self.isExtended.toggle()

                    })
                }
                Text("Test").onTapGesture {
                    self.isExtended.toggle()

                }
                if isExtended{
                    ForEach(0..<10,id:\.self){ index in
                        Text("\(index)")
                    }
                }

            }
        }

Output

The code you have posted does not appear to relocate when the expanded section is toggled. Are you making changes to hide the status bar? — John M.
– John M., Commented Nov 14, 2019 at 22:13

Asperi · Accepted Answer · 2019-11-15 03:33:56Z

0

All works as expected. By reader.frame(in: .global).minY you get ScroolView content view's minY (and not ScroolView's itself as you might expected) allowed position for spring effect when you drag upward out of screen. Try to drag and you see it in debug output.

edited Nov 15, 2019 at 3:33

answered Nov 15, 2019 at 3:26

Asperi

262k28 gold badges592 silver badges885 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Altern Over a year ago

I know it is content minY. MinY decreased when i tap extend and also it increased normal position in miliseconds. It works well when i drag scrollview.

Asperi Over a year ago

ok, then please clarify the question, because I don't observe anything 'weird' in how provided code behaves.

Collectives™ on Stack Overflow

SwiftUI ScrollView weird vertical stretch

1 Answer 1

2 Comments

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Related